When using Global Changes to set or clear the Week 1 / Month 1 flag, the changes are not applied.
This occurs if your Sage 50 Payroll username contains a space or special character, e.g. "john smith" or "john-smith".
We are investigating this issue. As a workaround you can either:
For help with creating and amending user names, please refer to our guide to Set up and maintain your users.