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Outlook Calendar Sharing - Sender not Verified

Posted on 2015-02-12
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Last Modified: 2015-03-23
We've come across a strange error with Outlook calendar sharing.  We have a particular user who has created a custom calendar and sent out several calendar sharing invitations.  Several users received the invitation and were able to open the calendar, while a few others, including myself, were not able to open the calendar.  The invitation contained the following error: "This sharing message is not valid.  All action buttons have been disabled." (Sender not verified).  For the user sending the invitation, I've tried disabling cache, deleting/recreating offline files folder, updating the address book and finally creating a completely new Outlook profile.  I verified in AD that the users email address appears within general properties tab, as that was a suggested resolution on another forum.  Also performed the same troubleshooting actions on one of the users who was not able to open the calendar.

We are running Exchange 2007 with a mix of Outlook 2010 & 2013. All users are running Windows 7 Pro and there are no POP3/IMAP4 accounts.
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Question by:Kemimol
9 Comments
 
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Expert Comment

by:Will Szymkowski
ID: 40606518
What SP version and RU are you running for Exchange? Also when the invitation was sent out did they sent it out to a distribution group or adding email accounts individually?

I have had similar experiences with Exchange 2007 having issues enumerating users with in distribution groups.

Can you also get the user to check the permissions on the Calendar they are sharing?

Will.
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LVL 31

Expert Comment

by:Gareth Gudger
ID: 40606548
I've seen issues like this after a migration from 2003 to 2007, if the Address Lists were never updated from Recipient Update Policies. In EMC can you edit your Address Lists? Or do you get any error messages?

Also, what happens if you try and open this Calendar Sharing Invite from Outlook Web App? Does it let you open/view the shared calendar from there?
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Author Comment

by:Kemimol
ID: 40608314
We're running SP3 RU10.  The invitation was sent out selecting each user from the Global Address Book.  Calendar permissions are set to read-only when the invitation is sent out.

In EMC, it allows me to edit all Address Lists, with the exception of the Default Global Address List. It appears I was able to open the calendar via OWA.  Will need to confirm with sender if it is the correct calendar appearing via OWA.
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Author Comment

by:Kemimol
ID: 40617112
Finally able to catch up with user.  The custom shared calendar did not pull up in OWA, as it was the individual's personal calendar.  I did try creating a new calendar on the users computer and sent out invitations to various users, including myself.  Same result for all users; Sender not Verified.  I did force a Global Address List update via the Exchange Management shell, and verified on users computer the updated list was downloaded.  Running out of ideas here.
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LVL 9

Expert Comment

by:Veerappan Sundaram
ID: 40628620
If it was the same invite that shows up differently for different users, find out the similarities and differences between sender and Working & Non-working set of users.

For e.g., Primary SMTP domain name, Exchange server & Database of these users, etc.

Enable outlook logging on the sender's outlook profile.
Send the calendar sharing invite.
Disable logging and check the logs for details.

Thanks,
Veera.
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Author Comment

by:Kemimol
ID: 40635541
This user now is no longer able to share out any newly created calendars.  Users who were able to access the previous shared calendar can still access, however, they cannot access any newly created calendars by this particular individual.  The primary SMTP domain name/Exchange Server/Database are all the same.  I did notice some legacy x.400/x.500 entries in this users Exchange properties.  After removing those entries, I tried sharing out a newly created calendar; same result.  Enabled logging and sent out another invitation.  Did the same from my own account and compared logs; no difference.
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Accepted Solution

by:
Kemimol earned 0 total points
ID: 40674051
Ultimately ended up finding a resolution by deleting and creating a new Windows login profile for the user.
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Author Closing Comment

by:Kemimol
ID: 40681931
Did not receive more than one response each from an "expert".  Ultimately ended up figuring out a solution ourselves.
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