Fix SPF Record for Microsoft 365

I need help fixing an existing SPF record for my domain. We're using Microsoft 365/Outlook. Currently, Microsoft 365 emails are not being delivered, and we need to resolve this issue. Ideal Skills and... (Budget: $30 - $250 AUD, Jobs: DNS, Microsoft, Microsoft 365, Microsoft Exchange, Microsoft Outlook, Technical Support, Troubleshooting, Windows Server)