This one is driving me up the wall!
Both in the same office, but different subnets so in effect totally seperate.
Both on SBS 2003 Std, with OWA confirmed as working. No SSL is used.
The BB's in question are used for either Company 1 or 2, and are under the same Carrier Contract.
All BB's set up for Company 2 work straight away, it only goes as far as asking for the email and password (I dont need to choose "I will provide extra settings" as normally do)
Company 1 however - The same error message every time. "Cannot log in. Verify your email address, user name and password. If the error persists, contact company1domain.co.uk"
I have called the carrier who insists there is nothing wrong their end, and I'm entitled to believe them because phones used for Company 2 work.
I have opened IIS and compared settings between the 2 servers and they are identical.
Not a firewall issue - all traffic has been allowed outbound for testing.
OWA works, mailboxe names triple checked.
Also tried changing AD Alias' to match mailbox name (although this wasnt needed on Company 2)
Complete loss as to what to check next. This isnt the first time I have set up BB's for BIS, and I am 100% the details are correct.