Cannot delete a send handler that is used by a send port

We had a mislabeled Host/Host Instance name in one of our lower environments - it wasn't the same name as our production or qa environments, and a request was sent to rename it. So, a colleague performed the following:

1. Create a new Host and Host Instance with the desired name.  
2. Once that was done, add the Host to the appropriate adapter. For us it was adding it to the FILE adapter.
3. Then re-configure all appropriate send ports to use the new Host Instance.

Restart Host Instances, and the send ports were properly using the newly created Hosts.

Once that was done, the thought was that the old host could be deleted. We came across a few things (some are obvious, others aren't so):

1. You need to remove the Host Name from all adapters using the (old) Host you wish to remove:

At this point, an error popped up - "Cannot delete a send handler that is used by a send port":

The issue is that, although all the static send ports were updated to use the new Handler, the dynamic send ports weren't - this isn't as obvious. Here's how to do that:

1. In the BizTalk Admin Console, select Applications/All Artifacts/Send Ports
2. Sort by Transport Type. Here is where you will see some that don't have the Transport Type as blank. These are your Dynamic Ports.
3. For each Dynamic Port, open one up and, in the General tab, select 'Configure'.
4. You will see a list of Send Handlers associated to each Adapter. You will need to make your changes in this list according to how you made your changes with your static Ports.

Once these changes are made throughout, you should be able to now remove the Handler completely, and thereby able to remove Host Instances, then the Host itself.

Further explanation here by the-one-and-only Saravana Kumar:

https://blogs.biztalk360.com/can-you-use-dynamic-send-port-without-orchestration-yes-you-can/

The "Behind the Scene" section was the eureka! moment for me. 







FYI - This was tested in BizTalk 2016.  I don't believe you can navigate the same way in BizTalk 2010.