"MIFv2 is not fully configured" when setting up ReleaseOps across two demo instances (Australia)

[Kohei Tominaga1]

Hi community,

I'm trying to set up ReleaseOps across two instances and can't get past the Multi-Instance Framework (MIF) trust step. I'd be grateful for any advice from anyone who has seen this error.

Environment
- Two ServiceNow-provided demo instances (not PDIs), both on the Australia release
- ReleaseOps 2.3.2 installed on both
- Goal: register one instance as the controller (Production) and the other as a managed instance (Development), then run an On-Demand pipeline between them

Symptoms
1. From Managed Instances, selecting the other instance and clicking "Send Requests" succeeds, but no request ever appears under Manager Instances on the receiving side. The reverse direction behaves the same way.
2. Creating the Manager Instance record manually on the managed side fails with:
Manager Instance not updated because MIFv2 is not fully configured
Invalid insert
3. The application log (source: sn_mif, job: MIF Sync Down Job) repeatedly shows:
Trusted Instance not updated because MIFv2 is not fully configured
4. Deployment Instance records can be created, but creating the trust profile fails.

Already checked
- /adcv2/supports_tls returns true on both instances
- sn_mif.glide.mif.exclude_customer_regex = MIF-ENABLE-ALL
- Each instance appears in the other's managed-instance candidate list
- MIF-related system properties are write_roles = maint, so they can't be changed with admin
- com.glide.mif.mtls does not appear in System Plugins (searched by name and by ID), though it may simply not be listed if it is provisioned internally

Questions
1. What exactly does "MIFv2 is fully configured" require? Is the Multi-Instance Framework mTLS plugin (com.glide.mif.mtls) the only missing piece, or are there other prerequisites?
2. Can that plugin be installed on ServiceNow-provided demo instances, and if so, is a Now Support request the right route?
3. Is there any way to confirm from the instance side whether MIFv2 is configured (a property, table, or diagnostic page)?

A related thread that pointed me toward the mTLS plugin:
https://www.servicenow.com/community/developer-forum/step-by-step-guidance-needed-configuring-cross-...

Thanks in advance for any pointers.