With help from support this is now fixed. I had to do the following...
1. Stop the Management Service
2. Stop the Update Manager Service
3. Use osql to run the following query against the Sophos database:
UPDATE dbo.LatestData SET DataSource = 'Settings/MetadataSignatures.deleted' WHERE DataSource = 'Settings/MetadataSignatures'
4. Start the Management Service
5. Start the Update Manager Service
6. Wait 5-10 minutes and then try creating a new / modifying a Software Subscription
With help from support this is now fixed. I had to do the following...
1. Stop the Management Service
2. Stop the Update Manager Service
3. Use osql to run the following query against the Sophos database:
UPDATE dbo.LatestData SET DataSource = 'Settings/MetadataSignatures.deleted' WHERE DataSource = 'Settings/MetadataSignatures'
4. Start the Management Service
5. Start the Update Manager Service
6. Wait 5-10 minutes and then try creating a new / modifying a Software Subscription