Windows can save all your credentials for web pages and network share, in order to manage your saved credential go to control panel : Control Panel->All Control Panel
When set the message size limits for incoming and outgoing email & attachments size, Please take under consideration the other side message size limitation . Change the defaults on
After migrating from on-perm to Office 365 on terminal server I get this blank authentication window. the fix I found is to add in the registery this key : HKCU\SOFTWARE\Microsoft\Office\15.0\Common\Identity\EnableADAL
