Antivirus Scanners and Exceptions, These applications are great for keeping bad things out, but not so great when you are running operations that move large amounts of data quickly (i.e. migrations and backup). If at all possible, disable all antivirus and malware scanners that are actively monitoring this host machine
If a complete disable is not possible, please strongly consider adding exceptions to the following locations:
• Essentials for Office 365 installation directory. By default, this is C:\Program Files\Quest\Essentials or C:\Program Files (x86)\Quest\Essentials
• Essentials for Office 365 workspace directory. By default, this is C:\Users\{UserDirectory}\Essentials
• Essentials for Office 365 temporary directory. By default, this is C:\Users\{UserDirectory}\AppData\Local\Temp
• Essentials for Office 365 backup location. If you are storing backups locally, please add this location(s) to the exception list as well.