Fix SPRequestFilterModule Missing in SharePoint Server 2016
Question details
Users are encountering a missing SPRequestFilterModule error following a recent SharePoint Server cumulative update.
- Product
- SharePoint Server 2016
- Device & OS
- not provided
- Scenario
- Operating or configuring an on-premises server after installing the September or December 2023 cumulative update.
- Observed behavior
- The system reports that SPRequestFilterModule is missing. Manually inserting the DLL fails to resolve the problem and instead triggers Web.config modifications or HTTP 503 errors.
Before proceeding with any server modifications or seeking support, ensure you have a complete backup of your IIS configuration and Web.config files to prevent irreversible HTTP 503 errors.
Consult Microsoft Q&A for SharePoint Configuration Support
Because this is a complex on-premises server configuration issue related to specific cumulative updates, reaching out to Microsoft specialists is the safest and most effective approach.
Attempting to manually register the SPRequestFilterModule DLL often corrupts the Web.config file, resulting in broader accessibility issues like HTTP 503 Service Unavailable errors. Official Microsoft support channels are equipped to provide the precise IIS configuration steps required for your specific server environment.
Open your web browser and visit the official Microsoft Q&A platform where server specialists handle on-premises deployment issues.
Create a new post detailing the SPRequestFilterModule error. Be sure to mention that this occurred specifically after installing the September or December 2023 cumulative update.
Add the 'SharePoint Server' tag to your question before publishing. This ensures the query is routed directly to SharePoint and IIS configuration experts for investigation.
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Frequently Asked Questions
Why is the SPRequestFilterModule missing after a cumulative update?
Certain SharePoint Server 2016 cumulative updates, particularly from late 2023, may fail to properly register or retain IIS modules during the patching process, leading to the system reporting the module as missing.
Can I fix the error by manually adding the missing DLL?
It is highly discouraged. Manually inserting the SPRequestFilterModule DLL frequently corrupts the Web.config file and causes the server to return HTTP 503 Service Unavailable errors.
Which specific SharePoint updates are known to trigger this issue?
Administrators primarily report encountering this missing module error after applying the September 2023 or December 2023 cumulative updates for SharePoint Server 2016.
