We have identified a reliability issue within Finance and Operations update 10.0.20. Environments on this version of Finance and Operations could encounter severe performance degradation or, in extreme cases, the service being inaccessible for a few minutes. The service will quickly recover but some unsaved work may be lost.
To prevent further impact, we have disabled update 10.0.20 (platform versions 7.0.6060.45 through 7.0.6060.95) from being applied to environments at this time. Additionally, a fix for this issue has been released and is available in the latest Quality Update as KB# 4642180.
How does this affect me?
Our telemetry has identified that your environment is running a version of update 10.0.20 that does not include this fix. As a result, your environment is currently at risk of being affected by this reliability issue.
What action do I need to take?
Please update your environment with the latest Quality Update as soon as possible to ensure the stability and health of your environment.
More information and instructions for applying Quality Updates can be located here: Apply updates to cloud environments - Finance & Operations | Dynamics 365 | Microsoft Docs.
Please contact Microsoft Support if you require assistance with performing this update.