Azure Pass-through Authentication
KB ID 0001642 Problem I’ve never really taken the time to look at pass-through authentication, I set up Azure AAD sync, then I either use ADFS or I don’t. It was only when looking at removing ADFS, that I even looked at it as an option. How does Pass-through Authentication Work? Remote client attempts to authenticate to Office 365 (Azure Active Directory). Azure queues the request and sends it to an Azure Authentication...
There is Currently No Route to the Mailbox Database
KB ID 0001413 Problem Background: Just introduced Exchange 2016 into Exchange 2013 Environment. Mailboxes on Exchange 2016, can send external mail and internal (to Exchange 2013) mail. No mail flows from Exchange 2013 to Exchange 2016. External mail to Exchange 2016, (which flows thought the 2013 server,) also fails. Event ID 5006 Cannot find information about owning Mailbox Server {server-path} for database {database-path} in routing...
Exchange 2019/16/13 – Where is the Queue Viewer?
KB ID 0000722 Problem Now that Microsoft have changed all the GUI management I struggled to locate the queue viewer. As it turns out it is NOT part of the Exchange admin center (https://localhost/ecp). Solution 1. Launch the Exchange Toolbox application. 2. And looking a little like its Exchange 2010 predecessor, you should see the queue viewer. 3. Which operates the same as it always has. Related Articles, References, Credits, or...
452 4.3.1 Insufficient system resources(Event ID 15006 and 15002)
KB ID 0000165 Problem When attempting to send mail to an Exchange EMail Server, you see the above error message. Usually the Exchange can send mail out and exhibits no other problems. You may also see one of the following error messages in the servers event log. This is caused by an Exchange “Feature” Called “Back Pressure”, and the usual culprit is, there is less than 4Gb (Lowered to 500Mb with SP1) on the...
Mail Routing Issue ‘451 5.7.3 Cannot achieve Exchange Server authentication’
KB ID 0000791 Problem While putting in a New Exchange 2010 server today, I test moved a mailbox to this new site, and could not get mail to flow to the Exchange 2010 server at the clients main site. 451 4.4.0 Primary target IP address responded with: “451 5.7.3 Cannot achieve Exchange Server authentication.” Attempted failover to alternate host , but that did not succeed. Either there are no alternative hosts, or delivery...