Outlook OAB download fails with 0x80004005 and/or 0x8004010F
Mar08

Outlook OAB download fails with 0x80004005 and/or 0x8004010F

KB ID 0000035  Problem 0x8004010F is caused by client not being able to see the Offline Address Book. 0x8004010F Error With Exchange 2013/2016/2019 Firstly make sure your autodiscover is correct, on the Exchange server open the Exchange management shell, and issue the following  command. Get-clientAccessServer | fl Name,AutoDiscoverServiceInternalUri If you need to fix/change it, use the following syntax. Set-ClientAccessServer...

Read More
Windows 11: Enable Ransomware Protection
Mar04

Windows 11: Enable Ransomware Protection

KB ID 0001774 Problem You can enable Ransomware protection to files and folders within Windows 11, (this assumes you have access to OneDrive). Locate and Enable Ransomware Protection  Windows Button > Settings. Search for “Windows Security”. Virus & Threat Protection (If yours is not selectable see the video (above). Locate Ransomware Protection. Switch to ‘On’. Yes. To se the folders currently being...

Read More
Stop Windows 11 Upgrade
Feb04

Stop Windows 11 Upgrade

KB ID 0001773 Problem I have no problem with Windows 11, In fact I prefer its UI. But if experience has taught me anything, it’s that businesses will not be as quick to adapt Windows 11 as the general public. Some private companies spend ‘ages’ testing production OS’s with various applications, and getting a change to that config can be a ‘challenge’. So there are valid reasons for wanting to stop a...

Read More
Group Won’t Accept Mail From ‘Outside’
Jan10

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...

Read More
Can you Use ‘Let’s Encrypt’ on Hybrid Exchange?
Jan07

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...

Read More
Exchange Y2KK Bug
Jan04

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...

Read More