Although it is possible to change this number, using a thread number too high might incur in the Throttling Policy that Microsoft 365 activates to control the resources external clients/connection require. Default number of VB365 Proxy connections is 64. The higher the number the faster potentially the backup job will complete. It is the number of active connections started by the VB365 Proxy responsible for backing up data. When sizing the VB365 Proxies there are two important VB365 parameters to know about: Objects can be any combination of Mail, Archive, Site, OneDrive and Teams. Check out the Configuration Maximums to see how many proxies can be used and how many objects each of them can handle. VB365 Proxy sizing depends on the total number of objects to protect.
