The product group released the March 2026 Cumulative Update for Office Online Server.
The KB article for March 2026 CU will be available at the following Location in a couple of hours:
- KB 5002846 – March 2026 Update for Office Online Server
The download for March 2026 CU is available through the following link:
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As part of the update process, we need to remove the farm, install the update, and create a new farm.
However, the New-OfficeWebAppFarm cmdlet gave us the following error :
New-OfficeWebAppsFarm : The operation failed. The server did not meet the following prerequisites:
– The “ASP.NET 4.5” Windows Server Feature must be installed and enabled.
– The “.NET Extensibility 4.5” Windows Server Feature must be installed and enabled.
I had to run this command :
dism /online /enable-feature /featurename:IIS-ASPNET45 /all
Afterwards, the Cmdlet worked as usual.
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the version of build on th web site is wrong
https://support.microsoft.com/en-us/topic/description-of-the-security-update-for-office-online-server-march-10-2026-kb5002846-feaf4988-11f7-45ec-987a-84067bad1d7d
it’s not 16.0.10417.20097 but when KB is deployed it’s 16.0.10417.20102
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Thanks Mazal!
I will forward your report to the relevant team.
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Hi Mazal,
the version number has been fixed now.
Cheers,
Stefan