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Coming upgrade:

The Jira and Confluence instance for external customers will be upgraded to the upper version. We use the Wednesday maintenance window to run the upgrade. Please expect a small-time outage for each instance between 5-8 PM CEST

Please check the release for 

Jira from v.8.13.1 to v 8.16.1 https://confluence.atlassian.com/jirasoftware/jira-software-release-notes-776821069.html

Confluence from v.7.8.3 to v.7.12.0 https://confluence.atlassian.com/doc/confluence-release-notes-327.html

We apology for all your inconvenience.