if maintenance window is deleted, does it impact synthetic availability calculation

[Harvey_Zhang]

if maintenance window is deleted, does it impact synthetic availability calculation?

[HannahM · Accepted solution]

Yes, if the Maintenance Window is deleted, then the availability will be for the whole period, including the period the maintenance window was previously covered. You can disable Synthetic monitor executions as part of a Maintenance window configuration. See documentation.

[Harvey_Zhang]

Does SLO impacted then?

[HannahM]

If you're using a metric that excludes maintenance windows, then yes, it would. If you intend to delete maintenance windows after they expire and don't want Synthetic failures from during the maintenance windows, then I would suggest disabling Synthetic executions. 
What's the use case for deleting the maintenance windows?