Ended up finding the solution and it was due to not having the "Maximum Elements per Cluster" field set high enough. Raised that setting and it finished.
However now we have a new issue that Mitel has escalated to their Tier 3. Hoping someone here may have seen it.
At this point it's configuring MiVB successfully but it isn't touching MiCollab at all. Here's those logs, the first log is what is displayed in the Configuration Wizard window and the 2nd is the actual text log that it generates:
Unsuccessful Operations: (View the log file for further details and corrective actions)
MiCollab NuPoint UM Data... on MiCollab server XXX.XXX.XXX.XXX (Failed)
MiCollab Network Element Synchronization on MiVoice Business (Skipped due to MiCollab Application Data failure)
MiVoice Business Groups (Skipped due to MiCollab Application Data failure)
_________________________________________________ _________________________________________________ ____
[Tue Aug 11 15:47:44 CDT 2020]: ConfigLog (main): Configuring Applications and Services on MiCollab...
[Tue Aug 11 15:47:44 CDT 2020]: Configuring MiCollab NuPoint UM Data... on MiCollab server XXX.XXX.XXX.XXX
[Tue Aug 11 15:47:44 CDT 2020]: ConfigLog (step): MiCollab NuPoint UM Data... on MiCollab server XXX.XXX.XXX.XXX
[Tue Aug 11 15:47:44 CDT 2020]: Starting the HTTP client
[Tue Aug 11 15:47:44 CDT 2020]: Error while handling an HTTP client call
[Tue Aug 11 15:47:44 CDT 2020]: Failed to configure servies on MiCollab. Error: java.lang.NullPointerException
[Tue Aug 11 15:47:44 CDT 2020]: MiCollab NuPoint UM Data... on MiCollab server XXX.XXX.XXX.XXX (Failed)
[Tue Aug 11 15:47:44 CDT 2020]: ConfigLog (main): Final MiVoice Business Configuration...
[Tue Aug 11 15:47:44 CDT 2020]: CSPV: Skipping configuration of Site Admin User Account data
[Tue Aug 11 15:47:44 CDT 2020]:
Finished configuring MiVB and MiCollab Server XXX.XXX.XXX.XXX.
[Tue Aug 11 15:47:44 CDT 2020]: File transfered successfully to host.
[Tue Aug 11 15:47:44 CDT 2020]: Uploaded MiConfigWizard Zip File to MiVB in the following directory - /db/database/sw_logs/.