I have 2 email accounts that were configured in outlook and both worked fine. But outlook was slow to send and recieve, not badly but enough that i sought a solution. I found something that suggested i delete a file in C:\Users\my name\AppData\Roaming\Microsoft\Outlook. I didn't delete it but saved it to desktop then restarted outlook. It then would not connect to the email server of one of my accounts, but the other worked fine still. So i replaced the file and still no joy. Deleted the non working account and tried to add it back but it couldn't find the server still so it couldn't configure it and i can't do it manually because i don't know te server settings and the email provider has no info on that. Then i uninstalled office and reinstalled. No joy trying to add the account, tho the working account was in there so it was stored somewhere on the PC and maybe if i knew i would find the other there too and could delete it and maybe that would help if something in it is corrupted. Uninstalled office again and looked to see if that folder at C:\Users\Dale\AppData\Roaming\Microsoft\Outlook was still there and it was, so i deleted it and found the one in program files was there still too so deleted that. Then restarted and installed office again. Nothing. It just will not connect to the server.
I know you're thinking the email server may be having a issue. But i can go to it as webmail and i get and can send emails from it. Plus the fact it started when i moved that file suggests something is corrupt. Guess i'll google "outlook 2007 clean uninstall and maybe that'll do it. In the meantime, if anyone has any ideas i'm all ears. I've googled it even using the error number and even then no joy.