Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.

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User is having problems with Microsoft Outlook.  I went to open "Mail" in Control Panel and it is missing.  Searched online and found a KB that said to apply all Windows Updates.  The PC is up to date.  Other strange thing is there is a Windows.old folder on the root of C Drive and this PC is new from Dell 3 months ago with Windows 10.  Screenshots attached.
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I created a PST file on my old computer containing my calendar info. I imported it, but all the entries ended up in what looks like a different calendar (the one in green) rather than the one in blue. I then tried creating a new appointment, but it ended up in the blue calendar. Which is where I need my appointments to go.
Two Calendars
How can I get all these "green" items into the blue calendar? I should add that when doing the import, I chose the second option below. I subsequently tried the first option, but it did not seem to do anything.
Import Options
At this point, I'd settle for a method that simply copies everything in the green calendar to the blue calendar.

Please I want to Update the address book on all outlook PCs, for that, Where is the setting gpo or gpp to automatically updated

Manauly :
In Outlook 2010 and Outlook 2013
tab Send/Receive-> Send/Receive Groups-> Define Send/Receive Groups--> download address book

Do you have an idea to turn this in bachground.

I am trying to create an Outlook email signature in Office 365.  When i create the signature rule, it applies to the user account but the formatting is all off.  The name, number, email and website all start on the left and go to right and to the next line.  It doesnt format it by:

First Last
phone number, extention
company site.
My Outlook address book for 'this computer' has disappeared. The ost file still exists. But selecting it as a datafile is no longer possible. I have not made any changes. It just happened.
we have office 2010 installed in our on premise xenapp server.perhaps we have seperate vdisks where office 2010 is  streamed to various delivery groups in studio

we have mailboxes in 365 and outlook 2010 is configured to talk to office 365.

we are currently upgrading outlook 2010 to outlook 2016 which will be still on premise.

right now i did a test on  1 VM which had c drive , i downloaded office 2016 from download center and configured the configuration.xml through online site and installed office 2016.

which looks to me click to run method and not .msi install

but to deploy on vdisk, i think i need to have shared computer activation in conf.xml and KMS , my question

can i just copy the office 2016 folder for office i created on my test vm to xenapp server , or i need to create an osi image , if osi image then which osi image we are referring to

basically what will be the steps for deploying..msi install of office 2016 on xenapp server
Installed a new Windows Server 2016 at an existing SBS 2011 site.  Email was Migrated to Office 365 several months ago and all clients were connected and working fine.

New server and domain are connected to Office 365 and Azure AD for management and password replication is working perfectly.

All Outlook 2010 clients connect to Office 365 fine.

None of the Outlook 2016 clients will connect to Office 365 for the previous user of the pc.  


"something went wrong we weren't able to register your device and add it to windows"

and it continually asks for password.

Machine User Profiles were migrated from old domain to new domain.

 Can add outlook profile for new users and, can add an outlook profile for the user on a different machine.

The problem seems to be only present when the following are present.

Windows 10 Pro
Outlook 2016
Outlook profile existed on machine before the domain migration.

I have tried removing all Outlook profiles from the mail control panel and the registry.  No Joy.
I asked about my Confirmation Email not getting thru using gmail, aol, yahoo and outlook. These are 2 answers I received, but I am not a programmer..... Can someone help me?

Response 1 :
Sounds like spam filtering.
Have you got an SPF record setup for your email domain that shows the GoDaddy servers as acceptable senders? If not, this could be causing emails to go into junk folders or be blocked altogether on systems like Gmail, AOL, etc.
GoDaddy emails are likely fine as it sees the emails coming from their own servers

Response 2 :
"A" has already mentioned spam filtering as the likely cause and I tend to agree. One thing to bear in mind is how you're actually generating email. If you're just using the basic mail() functionality within PHP, then that often gets tagged as spam, because it's very easy to miss out valid headers. The email you send does then tend to look like it's been auto-generated by a script (aka SPAM).
When sending email from PHP, I would suggest you look at something like the PHPMailer library. It gives you a lot more config options and it may help to make your emails appear as 'more genuine' to the mail servers.

Have had an Exchange 2010 setup for years.  Have had clients connected to it just as long.

All of the sudden, users are not able to receive mail from within Outlook.  We receive the error:

Cannot expand the folder.  The set of folders cannot be open.  You must connect to Microsoft Exchange with the current profile before you can synchronize your folders with your Outlook data file (.ost).

I can successfully connect to the account(s) using my Android phone.  I can access the accounts via OWA.

Per some research I did online, I created a new profile and connected to the account, but could not access anything.

Please advise.

Thank you,

Hello experts,

We are in the process of cleaning up SMTP/email addresses (ie, removed invalid characters from the email address) from distribution groups/distribution lists and after doing so, users are reporting the "email message cannot be delivered to <email address> because the email address is no longer valid" message once they are using outlook. BTW, only the SMTP address changed (alias and display name remained unchanged) They are getting the emails but the message is causing confusion.

We have Exchange 2010, Outlook 2010, cached mode is enabled.
I haven't tried disabling and enabling cached mode because it is grayed out for me but ran /cleanautocompletecache, and no avail.
Checked adsiedit property - proxy attribute and mail have the same values (which = new updated email)

Any suggestions?

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I am currently looking to migrate users from exchange 2010 on prem to O365.
Users all currently have Outlook 2016 installed from there 365 accounts but are connected to their exchange 2010 account.
Is there a way I can use group policy or something similar to create a new mail profile to point to their O365 account?

I have downloaded the Office 2016 Group policies and there doesn't seem to be anything related to profiles?
Outlook keeps hanging.
I have a customer usihg outlook 2oo6 and the program hangs ranomly,

Any suggetios?
A user deleted a public sub folder and when using recover deleted items we get an error

"Outlook was unable to recover some or all of the items in this folder. Make sure you have the required permissions to recover items in this folder, and try again. If the problem persists, contact your administrator"

We have tried setting up outlook as the user who deleted it as well as the domain administrator's account. This is a SBS2011 server with exchange 2010. The client uses outlook 2007 and I have tried setting up the accounts in outlook 2013.

We have checked the permissions and it shows that everyone are owners. The "All Public Folders" does not have the option to change permissions and just says summary with nothing listed. It just says Custom next to where is says permissions under the summary tab.

Thanks for any advice!
I am using vs 2013 vb.net. I need Microsoft Outlook Object Library 15.0.
It is not list as a COM Objects.  How do I get the Library included.  

14.0 is list but is cannot be loaded.

I need to load it for application that will update users Outlook Calendar.

I have am moving from one computer to another. I have 3 Outlook 2016 profiles. I have moved all 3 profiles to new computer. How do I determine which profile is using which Stream_Autocomplete file for nickname cache. It seems to be working fine on 2 profiles but not the 3rd. I have access to the C:\Users\username\AppData\Local\Microsoft\Outlook\RoamCache folder from both computers. Any help would be greatly appreciated.
Scenario:  E-mail from an external company is not making it to our Exchange 2013 environment.  The message never hits any of our managed mail servers.  The sender does not receive a "Message Undeliverable" response, and believes the message was delivered.  The message is not being blocked by any of our anti-malware filters.  All other external messages are coming through just fine.

Question: What kind of information can I gather from the sender, and the public internet, to determine where the message is going?  

All thoughts and suggestions are greatly appreciated.
Hi everybody,

I have a single Exchange 2016 server. We use Outlook 2016.
I just upgrade Exchange from CU3 to CU9. All is working fine except for one point.
Existing outlook profile don't work. When the click on the outlook icon, Outlook doesn't open, we just have a popup with "Unable to start Microsoft Outlook. Unable to open Outlook windows. Unable to open all the folder. Attempt to log on to Microsoft Exchange has failed". I can't test connectivity because Outlook doesn't opens. OWA and ActiveSync are working well.
If I create a new profile, it's working ! But existing profiles don't work :-(
I do the windows update of a computer, no change.
I reboot the Exchange server, no change.
I try Outlook.exe /resetnavpane, no change.
I try Outlook.exe /safe, no change.

For information, 2 years ago, I upgrade from Exchange 2010 to Exchange 2016.

In this post, the problem is the same but there is no solution : https://www.experts-exchange.com/questions/29076265/After-Exchange-2016-Migration-Outlook-will-not-open-Cannot-connect-to-server.html

If I do a Wireshark on the client, no traffic to my Exchange server, nothing appens when I click on Outlook icon and have the popup error.

Can you help me please ? I have 2000 users...
Thanks a lot !
Best regards
I recently added a UCC certificate to a newly installed exchange 2010 server. I still get a name mismatch for local exchange outlook connections who are inside the LAN.

my Certificate is a for mail.xxxxx.com  the name mismatch is for the local connection   mail02.xxxx.local..

Sorry certificates are not my thing, any help would be appreciated
Hi we have clients using Outlook 2016 running on exchange server 2013

We created some Public folders months ago which the users were able to connect to, we have since had to delete their Outlook profile to recreate it, ever since we have done this Public folders do not show, they are able to view them in Webmail?
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Hi All
I am in the process of deploying exchange 2013. I have used your videos to learn about exchange 2013.

I have a vm environment in which i have 2 2012 DC's and 2 exchange servers. one is 2010 and the other is 2013.

My challenge is that i am unable to connect via outlook on exchange server 2013 itself. It first said there is no default gateway so i followed experts exchange suggestion to change registry which didnt help.

When i try to configure outlook Auto account setup is able to find my username with email address. After this i click next and i get a security certficate error indicating the name on the security certificate is invalid or does not match the name of the site. i click yes to proceed. After this it gives me the following

"The action cannot be completed. The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action"

If i click ok, i get a sid like number @mydomain.com. clicking ok results in logon to server with a cross sign. thus i am unable to proceed any further

Requesting assistance on this please. Thanks in advance for your assistance.

The suggestion from expert exchange was as follows
Click Start, click Run, type regedit in the Open box, and then click OK.
Locate and then click the following subkey:
On the Edit menu, point to New, and then click DWORD Value.
Type DefConnectOpts, and then press ENTER.
Hi Guys,

Having an issue where people are unable to setup out of office in the outlook client. "your automatic replies cannot be displayed because the server is unavailable"
We use Exchange 2010 and Outlook 2016 clients, it's the regular issue where you can set it with OWA but not Outlook - Something to do with EWS by the sounds of it!

There's a lot of info online which I've been reading into and following, I feel like I'm making progress but the actual problem is still occurring.

Autodiscover was missing externally so I've added this and it's now successful when using testconnectivity but when I use the "Automatic Reply/EWS" option, it's succeeding until the bottom where it says the below:

      Creating a temporary folder to perform synchronization tests.
       Failed to create temporary folder for performing tests.
      Additional Details
ErrorADUnavailable: Active Directory is unavailable. Try again later.
Elapsed Time: 2832 ms.

Can anyone advise on what I may be missing? All the URLs have been entered when I test the autodiscover within outlook.
I'm unsure if the fact it's saying AD is unavailable is related.

Hello Experts:

I had to re-install Windows on my office computer.  This required re-installing all my software.  All is well with the exception of QuickBooks.  I use the 2018 Desktop version.

I email invoices to several customers.  I use Outlook 2016.

I use Outlook for my business email and Thunderbird for my personal email.

When I set up QuickBooks to email invoices, the only option I have is Thunderbird.  It was set to Outlook when I first installed Office.  But after I installed Thunderbird, the option changed to Thunderbird.

Outlook is my default mail program in Windows.  I've edited the .ini file per instruction from Intuit.  I have checked three articles sent from Intuit support that address this situation.  Everything they suggest is satisfied.  Still, Outlook is not available as an option.

Anyone have any suggestions?  I’m guessing it’s a registry hack, I just don’t know where to look or what to thange.


Down the Rabbit Hole with Max Send/Receive Limits on Exchange 2010 (Short and  Sweet as possible!)  

1) Transport rule has a Max Send/Receive limit  409600 (400 megs) (yeah yeah, i know, im trying to fix this)
2) Send connector Max message size is 490000 (490 megs) (yeah yeah i know, im trying to fix this :)
3) Receive Connector Max message size is 204800 (204 megs)
4) Individual mailbox Send Maximum message size and Receiving Maximum message blank (unlimited) - Powershell command for all users also shows unlimited/unlimited
5) There are no Transport rules that limit send/receive attachment sizes.

So internal emails apparently have unlimited message sizes (when left unchecked in the individual mailbox's settings) and they have precedence according to MS:
https://docs.microsoft.com/en-us/Exchange/mail-flow/message-size-limits   (i realize the link is 2016 but it also counts for 2010)

SO, ive sent test internal emails of

Here is where I am confused.  When trying to drag and drop the last attachment into a 420 Meg email I would pop "The attachment size exceeds the allowable limit".  I confirmed the sending mailbox and receiving mailbox have no send/receive (both unchecked) or mailbox size limits.  Why would this fail?  It seems to be using the transport rule maximum instead of having no maximum as per MS documentation.
I have the following code which is working perfectly:

Public Sub MakeThisConfidential()
Application.ActiveInspector.CurrentItem.Sensitivity = olConfidential
' MyMsg = MsgBox(Prompt, 0, "This message has been marked Confidential and will be encrypted by Fusemail")
MyMsg = MsgBox("Click OK to accept status" & vbCrLf & "This will encrypt the Current Message using fusemail", 0, "This message has been marked Confidential")
End Sub

Sub ToggleSensitivity()
    If ActiveInspector.CurrentItem.Sensitivity = olConfidential Then
        ActiveInspector.CurrentItem.Sensitivity = olNormal
        MyMsg = MsgBox("Click OK to accept status" & vbCrLf & "This will NOT encrypt the Current Message using fusemail", 0, "This message has been marked Normal")
        ActiveInspector.CurrentItem.Sensitivity = olConfidential
        MyMsg = MsgBox("Click OK to accept status" & vbCrLf & "This will encrypt the Current Message using fusemail", 0, "This message has been marked as Confidential")
    End If
End Sub

Open in new window

I have attached it to 2 separate buttons
I want to be able to run the macros and change the current button image. The image is added by the outlook interface:
In the New Mail window:
File - Options - Customise Ribbon - Main Tabs - New Mail Message
There is a group in here which has buttons with the macro's attached
Outlook Constantly Displaying error message, and then when eventually works mailbox stops updating after a while.

See Attached screenshot of error.






Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.

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