for me, this issue is specific to mu wp8 lumia but i thought it would he best here to see if any other platform is affected.
last night i noticed my outlook email account wasn't syncing with my phone so i did a hard reset first(was planning on doing this anyway) and after that i started getting error codes about the dub hotmail server and error code 86000c0a i think it was.
now i did a bit of googling and this sort of error is based around a Microsoft exchange error, which isn't applicable with outlook.com and i resolved my issue, well worked around my issues by changing the server from default dub404 to dub406 and it works...for about 5 mins.
has anyone else been having issues with their Microsoft account on any other platform? And if so are there any settings on outlook.com where you can change servers/syncing?