![]() ![]() ![]() Natural conclusion drawn was that something was wrong with certificates, may be expired. When looked into the category “Microsoft Office Web Apps” in Windows Event Logs, we found the error “Could not establish trust relationship for the SSL/TLS secure channel with authority” being logged repeatedly. Initial InvestigationsĪs it happens with all such issues we started looking into OWA Server logs. Update: As per Microsoft, this is a known issue (“System Center 2016 Operations Manager APM Agent causing heap corruption in SharePoint”) and documented here. Strangely, all other office file types (Word, PowerPoint) continued to work in browser without any issues. We ran into a problem completing your request. ![]() Until one fine day, while opening Excel files in browser started throwing the below error – We had a SharePoint 2016 medium size farm (2 WFEs, 2 App Servers, 2 DB Servers & 2 OWA Servers) configured and running perfectly fine for a few months. ![]()
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