Mark of the Web and trusting SharePoint Online
Andrew A common measure in corporate environments is to block macros files downloaded from the internet, which is implemented as a security measure to prevent users from inadvertently executing malicious. How…
Exchange Online SPF and domain validation
When on-boarding a domain to Exchange Online there is support documentation available detailing the DNS entries required for the domain to be successfully validated. One item not explicitly stated in…
Exchange Online DNS validator
Recently in doing a migration project to Exchange Online Protection (for a large number of domains) it was necessary on a regular basis to make changes to DNS records, and…
Office Cloud Policy priority of policies
Recently when deploying Microsoft Office Macro controls using the Office cloud policy service the deployment approach was to create two policies – the first blocking the use of macros, and…
Mail sent to the wrong Office 365 region. ATTR35.
I encountered this error for a system relaying mail via Microsoft 365, sending mail to users within the organisation was working as expected however the sending system was getting the…
Microsoft 365 dkim=fail (no key for signature)
Recently I was working on a migration project moving a number of domains from a 3rd party mail hygiene solution to Defender for Office 365 and as part of the…