I administer a site with around 50 users. The majority use one of three 2008R2 terminal servers. Office 2010 is in use, with Outlook 2010. Mail is hosted in the cloud, via Office365.
Recently, several users have reported the same issue. Under the "From" column in Outlook the display name is displayed as expected. If a user forwards an email, or attempts to reply, it is blank. So far 4 users have reported the same issue. It is intermittent, and only affects some emails. Once an email does this however, successive attempts to reply do not seem to help.
I tried creating a new profile and downloading one user's entire mailbox, that did NOT solve the issue. In one case, I added a mailbox to my own Outlook profile (on a PC), it seems fine. For one user, the problem vanished when I set their reply signature; unsure if that was related. It is the same problem affecting multiple users, however there seems to be little pattern to it. It only began happening a couple of days ago.
I plan to reboot the three TS boxes and the DC/File server in around 4 hours. If that does nothing I have no idea what to try next.
Anyone else seen this?