Does the uses Primary SMTP address in Exchange (reply to) have to match the SIP address for Lync? We have a situation where we are doing a migration to Exchange and want to keep the users current primary SMTP address for about a month, and then change it over to something else. Its just easier for us for reasons I can't get into.

My concern is after the users are migrated and they create their profiles, we will be install the Lync 2010 client on their computers. The SIP address we have configured for Lync is different than their primary SMTP address so I am guessing this will cause a problem? Even after we change it on Exchange to the new SMTP address which will match the SIP. the profile still has the old SMTP address so they will need to recreate their profiles? Not sure about this so need some help.

It is possible to have a different sip address as the smtp address.

Depend on you DNS, Exchange deployment it may be necessary to recreate the outlook profile.

You can test this with one of your users.

Hi,

you can have a completely different email address without any problem. you need to make sure that you set the client policy to "do not match the email address" and make sure that the EWS works internally and externally.

the only thing that you'll miss is that, in case of EWS didn't work, it will not fall back to MAPI (MAPI needs both email and SIP address to be the same) your exchange integration will have issue. 

Before doing anything, make sure the EWS works :)

Hi,

you can have a completely different email address without any problem. you need to make sure that you set the client policy to "do not match the email address" and make sure that the EWS works internally and externally.

the only thing that you'll miss is that, in case of EWS didn't work, it will not fall back to MAPI (MAPI needs both email and SIP address to be the same) your exchange integration will have issue. 

Before doing anything, make sure the EWS works :)

• Proposed as answer by Sharon.ShenMicrosoft contingent staff, Moderator Tuesday, July 09, 2013 6:09 AM
• Marked as answer by Kent-HuangModerator Friday, August 02, 2013 6:02 AM

Hi,

you can have a completely different email address without any problem. you need to make sure that you set the client policy to "do not match the email address" and make sure that the EWS works internally and externally.

the only thing that you'll miss is that, in case of EWS didn't work, it will not fall back to MAPI (MAPI needs both email and SIP address to be the same) your exchange integration will have issue. 

Before doing anything, make sure the EWS works :)

• Proposed as answer by Sharon.ShenMicrosoft contingent staff, Moderator Tuesday, July 09, 2013 6:09 AM
• Marked as answer by Kent-HuangModerator Friday, August 02, 2013 6:02 AM

Hi,

I have had the same issue and resolved it by recreating outlook profile using the sip domain address instead of the primary smtp address and changing email address in the AD account properties to match the sip domain rather the primary SMTP address.  This worked well, until a day later when AD replication over wrote the email address in AD and broke the lync client again.

Any ideas?

Thanks

Hi-  We have the same issue in our environment.  We have users with a different SIP address than their Primary SMTP address.   This article explains some resolution steps KB2000886

The  KB2000886 should be a good start to troubleshoot the Outlook integration.