Issue: Unable to see presence after federation.
Error: When contacting your support team, reference error ID 504 (source ID 239).
Recently I have done the Lync federation with another Lync in-house organization. I have added the access edge to both Lync environment. After federation we are able to find each other in Lync however unable to see presence information.
When you ping to each other then it will share above error message.
Resolution / Workaround:
First you need to setup Lync federation. There are many steps involved in Lync federation. You may refer below article for federation.
To configure a user policy for anonymous participation in meeting:
To enable or disable federated user access for your organization:
After configuring completing federation steps. Do the following steps-
There are two reason behind above error.
1. Certificate –
Order the SSL certificate which from external CA which trusted by Lync.
If issue persist then do the following.
2. SRV Record – Federation SRV recods.
In my case we have created SRV, A records however we missed Federation SRV Record.
priority = 0
weight = 0
port = 5061
svr hostname =
After creation of above SRV record user were able to see each other presence status.