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SIPAddresses post Office 365 migrations

Posted on 2016-08-29
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Last Modified: 2016-09-01
We are having some issues with Office Communicator after migrating users to the Office 365 cloud.

The trouble, I think, is because we have one AD domain to log into (Contoso.com), but users some users may have an alternate PrimarySMTPAddress based on their site (NorthwindTraders.com) and Communicator allows the SIP of NorthwindTraders.com.

Communicator used to be able to use their SAMaccount to log in, so now when Communicator tries to connect to Outlook for meetings or contact info, it prompts the users continuously for their credential...

Example:
SAMAccount:     John.Doe
UPN:      John.Doe@contoso.com
PrimarySMTPAddress:      John.Doe@NorthwindTraders.com
EmailAlias:     John.Doe@contoso.com
SIPAddress:     John.Doe@NorthwindTraders.com

I assume that we would simply have to change all msrtcsip-primaryuseraddress addresses to match the users UPNs?

If so, does anyone have a script to assist please? Probably need to firstly export a list of users with non-Contoso.com SIP addresses then just change those to match the UPN?

Thanks for any help in advance.
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Question by:Christian Hans
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Ganesamoorthy S earned 500 total points
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Active Directory On-premises SMTP did not match with their Office365 SMTP name, need to sync this

http://www.windowstricks.in/2016/08/active-directory-premises-user-name-not-match-office365-user-name.html
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