Group Won’t Accept Mail From ‘Outside’
KB ID 0001771 Problem Exchange has been this way for a long time here’s me explaining this very problem with older versions of Exchange. If you create a ‘Group’, be that a Distribution Group, or a ‘Microsoft 365′ Group, the default setting is to NOT ALLOW mail from anyone outside your organisation. If you attempt to send mail to that group you will see errors like these; Errors; 550 5.7.133...
Can you Use ‘Let’s Encrypt’ on Hybrid Exchange?
KB ID 0001770 Problem A few months ago I wrote an article about getting free exchange certificates with Lets ‘Encrypt’. And that still works peachy, I implemented it on my test Exchange 2019 server (in Hybrid mode) and all appeared well. Some time later, (remember this is my test network so it’s not in production.) I noticed that mail was not getting forwarded from O365 to the on premises Exchange server. I’ve...
Exchange Y2KK Bug
KB ID 0001769 Y2KK Problem Over the last couple of days the Exchange forums have been alight with the Y2KK bug, typically it affects Exchange 2016 and 2019 (though the chatter is, it actually effects any Exchange versions whose update version begins with 22… This is fine below, (it begins with 21..) Add-PSSnapin Microsoft.Forefront.Filtering.Management.Powershell Get-EngineUpdateInformation Y2KK Symptoms Emails No Longer Being...
Exchange ECP HTTP 500 Error
KB ID 0001756 Problem This infuriatingly happens to me a lot! Every time the fix is the same, (but is a little impractical). Essentially you attempt to log in to ECP (Exchange Admin Center), you a prompted for your credentials, then you just get a ‘500 Error”. The website cannot display the page HTTP 500 Most likely causes: •The website is under maintenance. •The website has a programming error. What you can try: ...
Microsoft Edge on Server 2019/2016 (and Citrix)
KB ID 0001657 Problem In a fit of lunacy Microsoft have called ‘their’ new browser Microsoft Edge, so we can spend the next few months confusing it with Edge. Plus every Google search for GPO settings, error messages etc will all now show search results for the old Edge Browser not the new Microsoft Edge browser! Perhaps the same doofus at Microsoft who called the Exchange sync Active Sync when Microsoft already had a...
Remote Desktop Services – Connection Errors
KB ID 0001132 Below is not an exhaustive list of connection errors, it’s just a some things that have tripped me up. If you have a nasty error that you have fixed, feel free to drop me a line, send me some screenshots and the fix, and I’ll add them as well. General Errors Remote Desktop can’t connect to the remote computer for one of the following reasons; 1) Remote access to the server is not enabled 2)The remote...