Why is my email signature not displaying when sending emails from a mobile device in Exchange?

1. Check for recent policy change:Check if your organization has recently updated mobile device policies and if the new policy includes any new restrictions for email signatures.
2. Check your device OS version:Make sure that your mobile operating system is up to date.
3. Troubleshoot settings:Check with your device settings and make sure that the HTML signature is enabled and that the signature settings are properly configured.
4. Clear app caches: Clear your device’s app caches in case cached information is causing a conflict with your signature settings.
5. Uninstall and reinstall the app: Uninstall and reinstall native Exchange app to ensure it works optimally and is able to access email signature settings.