Discussion thread Very slow to load

Good afternoon,

Running GW 2014 R2 on SLES server.

I have one user who is having issues with her discussion thread loading. It takes over 3.5 minutes on the 14.2.1 client and 14.2.0 client. Tested on various pc's.

I've run gwcheck on the mailbox twice from the admin console and this has not improved anything.

I have not rebuilt the users mailbox.

Any ideas would be appreciated