I have a project to migrate our Exchange 2003 environment to Exchange 2010. As part of that project, I built a test sand-boxed Exchange 2010 Environment. It is working well, mail flows in and out without issue. However, I have one very, very
unusual situation. Both OWA and ECP display in Arabic after I log on. As well, the language drop down box displays only about 10 choices, all in Arabic. I thought this was specific to just one mailbox, so I tied the following at the Power Command Shell...(1033=English
USA)
Set-Mailbox -Identity "Test User" -Languages "1033"
but, that didn't work. I then discovered that all test users default to Arabic.
I then tried setting the default language for all users,but that also didn't work.
Set-OWAVirtualDirectory “owa (Default Web Site)” -DefaultClientLanguage 1033
The test environment used a Front End Exchange Server 2010 on W2K8, the backend Mail W2K8
server holds all roles: CAS, HTS, MBx, and UM.