Exchange Function to Test MRSProxy Endpoint Authentication
Exchange

Exchange Function to Test MRSProxy Endpoint Authentication

This week, I was helping someone troubleshoot authentication issues when hybrid migration mailboxes to Exchange Online.

In order to migrate a mailbox successfully, the EWS endpoint virtual directory should have NTLM/Negotiate authentication method available.

You can quickly see what the endpoint is showing available by using this function:

Function Test-MigrationEndpointAuthentication($Url)
{
  # Build URL
  $Url = $Url.TrimEnd('.').TrimEnd('/').TrimEnd('.')
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What happens when an Office 365 customer doesn't point to EOP as their MX?
Exchange

What happens when an Office 365 customer doesn’t point to EOP as their MX?

I get asked this question quite frequently–usually by customers who want to continue using their existing on-premises antispam or antimalware gateway or want to attempt to implement a defense-in-depth strategy.

The graph and intelligence behind Exchange Online Protection (EOP) processes at least half a trillion (500,000,000,000) messages a month–the AI behind it is continually monitoring and learning what is spam and what is not. … [ Continue reading ]