Kellywenz5

While using Microsoft Outlook, you may face several issues.

If that message has an attachment that's larger than 20MB, delete the attachment and either attach a smaller file or attach a link to the attachment.

Any existing Outlook profile, Office 365, or Live Exchange Server can import the OST file’s contents directly.

The idea is to provide a recycle bin of users who you can delete when you no longer need them.

Upon each opening of the app teh complete synchronization is being done.I guess this should not be normal behavior?!

Sometimes, aggressive antivirus programs block Outlook’s execution.

You can try to repair Office by using the appropriate built-in tool.