Between 17:55 UTC and 18:40 UTC on 05 Dec 2022, a subset of customers in North Central US may have experienced issues with emails not getting signatures or being slightly delayed. This did not impact email deliverability in any way.
What went wrong and how we responded
We observed a problem with Microsoft’s SQL database availability in North Central US, which affected automatic scaling. We immediately switched to secondary services in the region but that did not fully remediate the issue, so we manually rescaled the SQL database.
What are the next steps?
We are investigating the database availability problem with Microsoft to make sure we’re no longer affected by such incidents on their side. We’ll also deploy custom scaling policies for the SQL database to replace standard mechanisms and ensure similar issues don’t happen in the future.