This page will always reflect the latest Release Notes, recent improvements and changes made to Nimbus.
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- Our Release Note History contains information on all previous releases from this year.
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📣Important Announcements
Please take note of the following long-term and ongoing announcements below:
INC PSTN License Check Enforcement Notice
☝Ahead Notice: Microsoft enforcing PSTN license checks for bot calls
Amendment 07.05.2025: Microsoft has moved the date from June to end of September.
From: https://devblogs.microsoft.com/microsoft365dev/enforcement-of-license-checks-for-pstn-bot-calls/
🔍 What’s changing?
Effective September 30, 2025:
- Teams users will still have the option to transfer calls to other Teams users manually even if they don’t have a PSTN phone system license.
- Bot-initiated transfers and add participant requests to non-phone system enabled users will be blocked.
🤔How does this affect Nimbus?
Nimbus uses bots to initiate and monitor (safe) transfers and create call conferences. If Microsoft decides to pull through with this change by September 30, 2025, all Nimbus transfers and consultation calls will be blocked and fail without any possible workaround or error handling.
Topic: Microsoft announced changes to PSTN license checks for bots. From the Blog Post of Microsoft:
As part of Microsoft’s feature parity with Teams Phone extensibility, we’re announcing the enforcement of Phone System license checks for Bot-initiated transfers to Teams users. This current gap in our systems will be addressed in September 2025.
Microsoft Teams requires that Teams users behind applications such as queue applications require a phone system license and the user to be Enterprise Voice Enabled. We’re aligning the Microsoft Graph API with that requirement.
What is the change?
Effective September 30, 2025:
- Teams users will still have the option to transfer calls to other Teams users manually even if they don’t have a PSTN phone system license.
- Bot-initiated transfers and add participant requests to non-phone system enabled users will be blocked.
🧭 What is the Impact for Luware Nimbus Users?
- Transfers Within Nimbus: Transfers to users without a Teams Phone license will no longer work. This includes internal transfers between agents or service users.
- Supervision Features: Supervisors must have a Teams Phone license to monitor or intervene in calls. Without it, supervision capabilities are disabled.
- Workflow Transfers: Any transfer initiated from a Nimbus workflow to a user lacking the appropriate license will fail. This disrupts automated routing logic and impacts service continuity.
- Attendant Console Transfers: Transfers via the Attendant Console to unlicensed users are blocked. This affects manual call handling and redirection.
✅ What you need to do
✅To ensure uninterrupted service:
This change mandates the use of a PSTN License on all Users you either transfer to or start a consultation call with.
- Audit User Licenses: Verify that all users involved in call handling, transfers, and supervision have the Microsoft Teams Phone license assigned.
- Update Workflows: Adjust workflows to route calls only to licensed users. This includes adjusting any Distribution Policies and Agent Service Settings for Agents with the according skills and responsibilities.
- Train Supervisors: Ensure supervisors understand the licensing requirements and have the necessary access.
- Monitor License Status: Implement checks or alerts to identify users without valid licenses.
☝Ahead Notice: Microsoft licensing changes
Amendment 03.09.2025: Added Operator Connect as affected customer base. Added clarification that Direct Routing customers are not affected.
Microsoft Licensing Change: What Nimbus Customers Need to Know About Calling Plan and Operator Connect Changes.
🔍 What’s changing?
Effective November 1, 2025:
- Microsoft will enforce a significant licensing change that directly impacts how outbound PSTN calls are handled in Microsoft Teams—especially for services like Call Queues (CQ) and Auto Attendants (AA).
- This change affects all organizations using Microsoft Calling Plans for telephony and it might affect organizations using Operator Connect.
-
The change has direct implications for Luware Nimbus customers in the following scenarios:
- When using Outbound Call functionality, including Call On Behalf.
- When using the Attendant Console for transfers to PSTN numbers.
- When doing Workflow Transfers to PSTN numbers.
🔍 What’s not affected?
- There is no change for Direct Routing phone numbers.
🔍 You will find the full announcement on the MSFT Learn page, specifically “Changes to licensing required for Auto attendant and Call queue outbound PSTN calling”. Excerpt quoted below - important parts highlighted:
Calling Plan
Starting November 1, 2025, a Pay-As-You-Go license will be required for Teams Voice Applications (Call Queues and Auto Attendants) Resource Accounts that use Calling Plan numbers for outbound PSTN calls.
The following scenarios will require a Pay-As-You-Go license:
- Outbound PSTN calls made by Teams Call Queue agents on behalf of a Resource Account
- Outbound PSTN calls made by Auto Attendants or Call Queues
- Callback PSTN calls initiated from Teams Call Queue or Teams Auto Attendant
- On-behalf-of calls made via Graph API and Phone System Extensibility
If Pay-As-You-Go licenses aren't assigned to the relevant Call Queue or Auto Attendant Resource Accounts by November 1, 2025, outbound calls will fail.
Operator Connect
On November 1, 2025, the following outbound calling scenarios may no longer be available depending on your carrier/operator:
- Outbound PSTN calls made by Teams Call Queue agents on behalf of a Resource Account
- Outbound PSTN calls made by Auto Attendants or Call Queues
- Callback PSTN calls initiated from Teams Call Queue or Teams Auto Attendant
- On-behalf-of calls made via Graph API and Phone System Extensibility
Coordinate with your carrier/operator to ensure you continue to have uninterrupted service for these on-behalf-of outbound PSTN call scenarios. If the appropriate arrangements aren't made with your carrier/operator, then outbound calls made by agents on behalf of resource accounts, by auto attendants or call queues or via the Graph API and Phone System Extensibility will fail.
Your carrier/operator provides the details on what adjustments may be required.
🤔How does this affect Nimbus?
Nimbus uses bots to initiate and monitor conferences well as monitor and report any Outbound Call calls and Call On Behalf of a Nimbus Service. Any transfer scenario also requires the Nimbus bot to take calls back safely.
This includes:
- CQ agents making calls on behalf of a Resource Account (RA)
- Callback scenarios configured in Call Queues
- Auto Attendants transferring calls externally
- Calls initiated via Graph API or Phone System extensibility
🧭 What is the Impact for Luware Nimbus Users?
For customers using Microsoft Telephony exclusively and leveraging Call On Behalf features via Luware Nimbus, this change means:
- You must replace existing Calling Plan / Operator connect licenses on resource accounts with Pay-As-You-Go licenses.
- Failure to do so will result in service interruptions for Outbound Calls initiated by Nimbus services, e.g. within either Attendant Console, Workflows in Contact Center routing.
- As highlighted in internal discussions with Microsoft, this enforcement aims to curb misuse but inadvertently affects legitimate use cases like those supported by Luware Nimbus.
✅ What you need to do
✅To ensure uninterrupted service: We urgently recommend for Customers begin transitioning to Pay-As-You-Go licenses well before November 1st to avoid last-minute disruptions.
- Review all resource accounts configured for outbound PSTN calls.
- Assign Pay-As-You-Go calling plan licenses to these accounts via the Microsoft 365 Admin Center.
- Validate license coverage for all users and services involved in call transfers.
- Consider setting up Communication Credits to fund Pay-As-You-Go usage if needed.
📞 Need Help?
If you’re unsure how this change affects your setup or need assistance updating your licensing, please reach out to your Luware Customer Success Manager or contact our Support Team.
INC Luware Support Address
Luware Website | https://luware.com/support/ |
---|---|
Luware Helpdesk | https://helpdesk.luware.cloud |
Cloud Service Status | https://status.luware.cloud/ |
End of announcements. Regular release notes continue below.
18 September 2025 - 1.117 Release Notes
🔖 This is a major update, bringing many new changes and improvements into Nimbus. This update is rolled out sequentially on our clusters:
Cluster | Update on |
---|---|
United States 01 / Australia 01 | 18.09.2025 |
United Kingdom 01 | 22.09.2025 |
Switzerland 02 / Germany 02 | 24.09.2025 |
Switzerland 01 | 28.09.2025 |
Europe 01 | 01.10.2025 |
Germany 01 | 05.10.2025 |
Search Improvements
- Customer Insights - Previous session details shown in the sidebar are now cleared when triggering a new search.
- Configuration Items - Search Persistence - Search terms within configuration items (e.g. Workflow names) now persists until manually "cleared". This makes editing multiple entities much more efficient, as the previous search result is restored.

Preferred User Routing - Naming improvements
With the upcoming release we’re introducing a small enhancement to the Preferred User Routing settings to make the Distribution Policies configuration more intuitive. As part of this update, we’ve renamed two configuration fields and related tooltips for better clarity.
- “Waiting Time” is now named “Initial Preference Phase”
- “Last User Routing Threshold” is now named “Last User Routing Phase”.
💡Please note that these are naming changes only. The underlying properties, behaviors, and any connected Power Automate flows remain unchanged.

Other Changes and Improvements
Terminology changes: We're streamlining how user session outcomes are recorded across the database, user portal, and admin portal. Previously, the terminology of “merged” was used to describe a user-initiated consultation call being converted into a conference call with multiple participants. With this change, the user session outcome in Nimbus Reporting & Nimbus Reporting Model will now be recorded as “Consulted Conferenced” to better reflect what actually happened.
💡Please note that this is a naming change only and there are no changes to the underlying functionality. We will gradually phase out “merged” wording in ongoing reviews, moving over to the “conference” lingo.
Detail changes:
-
Nimbus UI labels to be renamed as follows:
- “Merge” buttons in Attendant Console will be renamed to “Conference”.
- Knowledge Base occurrences of “merge” have already been replaced on various pages such as: