Does adding a new PC cause credential Boxes to appear on Outlook?

Hi All,

Since adding a new user to Active Directory and new PC to the domain, our client has had credentials boxes appearing all day long when they use outlook. Now adding their credentials does make the box disappear, but it then reappears a short time later. One user has also not received emails on their phone since. I added the PC to the domain the manual way, by right clicking computer and then properties and then added it there. Once I had done this, I did also add Domain users to the local admin group so they have access. Is there something that occurs when adding a PC to a domain that causes the credentials box to appear?

I don't know if it is related, but the new user is unable to access a network drive that was mapped the day the PC was added, but she has full access rights set in the security.

The server we use is SBS 2008 if this also helps

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Larry Struckmeyer MVPCommented:
Adding one PC to an SBS network should not cause others to have to enter credentials when accessing OL to access the local exchange server.  However it is not recommended to bypass the SBS add a computer wizard and http://connect to add a system.  Also, it should not be required to make domain users local admins for the systems to work properly, only to give local admin creds to add software or install printers.

For the credentials issue... look at cached credentials.  This can cause your symptoms especially after a system wide password change due to password age.
dcleaverAuthor Commented:
Thank you for the reply

I did try to use http://connect when I was adding it to the domain but for some reason, it said page cannot be displayed, so that's what made me use the wizard instead. Would it be worth removing it from the domain and then re-adding it using this method? I just did that as general practice to prevent it asking for admin details when they accessed certain programs, just added to make sure I included all information

I did not think of checking the cached credentials, would it be worth doing it on all PC's on the domain
James NewportCommented:
Add the server certificate to the PC if you are using the self signed one -

Path is \\server\public\downloads if I remember correctly
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dcleaverAuthor Commented:
Thank you James, that did allow me to access the drive that was having issues

I still however am receiving the credentials box whenever I or they use outlook. Is there a way to stop this appearing?
Larry Struckmeyer MVPCommented:
For the credentials issue... look at cached credentials.  This can cause your symptoms especially after a system wide password change due to password age.
dcleaverAuthor Commented:
Larry, would that resolve it for all users though? They havent got group policy that makes them change password so its down to them whether they wish to change their passwords. Would changing the domain password be a better option?

Is it because I didn't add it using 'http://connect' so could that be the issue. The only problem is I have tried to do it again, but it told me I dont have the system requirments, even though the workstation is Windows 7 x64.
dcleaverAuthor Commented:
Turns out the SBS certificate had expired the exact same day this PC was installed. Strange as didnt affect anything else but renewing this seems to have got rid of the credentials box, so going to close the question. Thanks for the help

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dcleaverAuthor Commented:
Found the root of the issue when trying to implement solutions
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