Migration Assessment Scan: Master Pages

Learn how to mitigate issues with Master pages during migration.


During migration, the default master page shouldbe set on all sites that are migrated. This ensures that the site will render once the migration is complete as the content migration will not have a dependency on any custom master pages. If you have custom master pages assigned to sites, you will need to set the Master Page property on the new site after the migration has completed.

Data Migration

Important: Custom master page files (*.master) shouldn't be migrated to the new platform. The setting on the destination site will be set to the default master page. This process ensures the site will render after the migration.

Preparing for Migration

Review the report and determine where you can move away from custom master pages before you migrate. Plan and understand what post migration work will be necessary to use the customized file moving forward.

Post Migration

If you decide to continue using the customized master page on the new platform, you will need to apply the master page setting and validate your customizations work on the new platform.

Scan Result Reports

NonDefaultMasterPages-detail.csv    This scan report contains all the sites that have a custom master page applied.




Unique identifier of the impacted site collection.


URL to the impacted site collection.


Owner of the site collection.


List of people listed as site collection administrators.


Size of the size collection in megabytes [MB]


Number of webs that exist in the site collection.


Name of the content database hosting the site collection.


SQL Server hosting the content database.


Size of the content database hosting the site collection.


Url to the subsite that has the master page setting configured.


Title of the impacted subsite.


Server relative path to the master page referenced by the MasterPageUrl property.


Server relative path to the master page referenced by the CustomMasterPageUrl property.


Unique identifier assigned to a specific execution of the SharePoint Migration Assessment Tool.

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