How to increase the VSS/scripts timeout on CPM 2.1 and higher
VSS timeout controls two parameters:
1) How long can a VSS operation take.
2) How much time can pass between VSS operations (e.g how much time can a snapshot take).
In v3.x, this setting can be configured in "Policy Instance and Volume Configuration" dialog:
In v2.4-2.7 VSS timeout can be set on a policy level, by using the "Scripts Timeout" setting under "More Options":
The default value for VSS is 2700 seconds (45 minutes), despite "300" shown in the UI in older versions.
You can try setting this field to a higher value, e.g. 36000 (10 hours).
For versions between 126.96.36.199 and 2.3.x, the following procedure should be used:
1) Open "Backup Targets" and click on "Configure" for the instance for which you need to increase the timeout.
2) Put the required value in "Scripts\VSS Timeout (in seconds)" and apply the change.