Hello,

How do you do, This is our first post to the forum. Thank you for providing great help!

Ok, on to our problem: We have the following:

a.com (DC, LyncFE-a, Edge-a)
auser1@a.com

b.com (DC, LyncFE-b, Edge-b)
buser1@b.com
buser2@b.com

So, buser1 and buser2 of b.com can send IMs and see presence without a problem. But when buser1@b.com opens Lync Client and types sip address for auser1@a.com, it shows "Presence Unknown", and then when he types a message, his client shows "This message was not delivered to auser because this person is unavailable or offline".

When using the Lync Logging tool from LyncFE-b, we notice that SIP messages never go out of LyncFE-b to EdgeFE-b at all. The Snooper Log shows the below error in red (this happens the other way as well from a.com too):

Component: UserServices
Level: TL_ERROR
Flag: TL_COMPONENT
Function: CNotifyDocGenerator::Ge...
Source: NotifyDocs.cpp (4582)
Date Time: Now...2015..
Error Message:
(00000000000371AC0) For Rejected publisher (user@a.com) deserialize succeeded but could not resolve ServiceTagID as ServiceCluster was empty after deserialize.

When typing a random-name@a.com, it does actually go through the edges to LyncFE-a, but of course doesnt exist. Why do non-existant usernames go through the edges, but existant usernames not go through the edges? CSStaticRoute isnt set up at this point, not sure if it is required.

Does anyone have any guidance? Thank you so much

• Edited by martKyu 7 hours 39 minutes ago

Is federation setup for the domain a and b oin both the Lync server setup?

Has the user been allowed for remote access and federation in remote policy?

for more information

https://technet.microsoft.com/en-us/library/jj205134(v=ocs.15).aspx