This setting is managed by your organization. You can set display languages through individual applications. O365
You might came across below error while trying to change your preferred display language in MyAccount O365. This setting is managed by your organization. You can set display languages through individual applications. Learn more about how to do this or contact your IT administrator. There could be few reasons for this error, couple of them are below. 1. Admin has set a policy that users cannot set their preferred language 2. Your organization has migrated or synced the AD from local to Azure How to change Preferred Language then? Method 1: In this case, the users cannot change their preferred language from UI. However, Admins can change their preferred language in local AD and set the prefferedLanguage attribute so the users will have the preferred language. Method 2: The other possible way is to set "MUILanguages" programmatically using a REST API call to Azure user profile. This will update this attribute in AD for the specified user and able to set its preferred language.