Is this affecting all users in the domain or just one user?
All users. One user.
Are you able to see users from this domain on your own Skype Client?
Yes. No.
Its possible the requested domain's federation is not opened. Please have the customer check with the user they are trying to reach, that their federation is set up correctly. .
Check on EPS to confirm that thier federation is open or allowed to Registered domains.
They are set to federate. They are not set up to federate.
Please gather the logs from the client and escalate to L2.
Allow them to federate with the requested domain/ Open their federation. They will need to wait for up to 24 hours for this to take effect. .
Can this user see no one from this domain or only one user?
Only one. Entire Domain.
Please try to flush the sip profile. Did this work?
Yes. No.
Please close this case.
Please make sure to remove this contact from ALL sources (Skype & Outlook). Did this work?
Yes. No.
Close this case..
Please gather the Logs and escalate to L2..
Check to see if this doman is allowed on EPS. Is this allowed?
Yes. No.