I have had similiar issues for quite sometime over the past 6 months.  As of total I have spoken too Customer Service, Technical Support numerous times and no resolution.  I have cleared out my cache, reset passwords, reset my email setup... I have been advised my ATT that it is Microsoft and I must contact them. Yet, there are oustanding know issues with ATT and email for outlook not working properly due to ATT systems, which I was told first hand by a technician who had the issue notification for his department.

I have advised each ATT rep that there has been no updates made on the system and that it has to be ATT system that have been changed. Everything worked beautifully up untl at least 6 months ago.

If my outlook email is not functional and pulling emails because it keeps prompting me to re-enter that blasted password yet it won't take it even after walking through all the proper email setting just about everytime it occurs which is at least every two weeks now.  If I go through my internet webmail and access then go into my outlook it for some reason finally allows the password to stick once I login again to my outlook and have it open the sametime I am on my web email.  This had been working for a bit, but as of today it has stopped functioning properly. It has magically appear to work then it randomly stops again.  I really wish ATT would switch to what was working because I am fed up.

My emails are very critical to School and work and can't afford to continue wasting my time calling ATT or resetting everything and crossing my fingers it will be resolved. What kind of service is this?