What Microsoft Purview licenses do I need for eDiscovery searches?
Advanced eDiscovery features like message ID searches in Microsoft Purview are locked behind premium subscriptions, leaving administrators guessing whether they need separate licenses for investigators and victim mailboxes. This ambiguity makes it difficult to purchase the right software without running afoul of complex rules, especially when managing a mix of nonprofit grant seats and commercial licenses.
What the numbers show
Counted from the threads quoted below. How we count
- People have been saying this in most months since September 2026.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
What Microsoft Purview licenses do I need for eDiscovery searches?
- 1Constructing custom PowerShell scripts for running forensics on compromised accountsDid this help you?
- 2Looking for other ways to locate the emails manuallyDid this help you?
- 3Comparing pricing across multiple CSPs and current resellersDid this help you?
- 4Consulting board members about tech stack vendorsDid this help you?
- 5Continuing to use legacy or alternative on-prem tools like Deploy and InventoryDid this help you?
- 6Relying on built-in tools like Microsoft Intune because they are bundled into existing servicesDid this help you?
- 7Searching for official ways to obtain temporary licenses or contacting Microsoft partners for assistance.Did this help you?
- 8Asking for clarification on IT community forumsDid this help you?
- 9Comparing multiple subscription tiers side-by-side to find the most cost-effective routeDid this help you?
- 10Upgrading to a more expensive, all-inclusive plan where the feature is natively baked inDid this help you?
- 11Switching to alternative hypervisors like Hyper-V, Proxmox, or KVMDid this help you?
- 12Uninstalling the software completely upon receiving an audit warningDid this help you?
- 13Refusing job offers that require supporting hostile enterprise softwareDid this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“Our nonprofit gets discounted M365 grant seats for most of the org but our fundraising team sits outside that program and pays full commercial rate every year.”source ↗
“Our finance committee meets in three weeks and wants real numbers. Has any other nonprofit split grant and commercial licensing across two vendors and kept it simple?”source ↗
“What I am missing is suitable temporary test licenses for BC14 and BC25 to run the intermediate upgrade steps in a separate test environment.”source ↗
“Any attempts to use Microsoft Purview and eDiscovery to search for the e-mails when using the message ID's is not allowed as its locked behind a premium feature subscription.”source ↗
“I don't want to run afoul of licensing and want to ensure i purchase the appropriate licenses to make this easier”source ↗
“I'm looking at purchasing the Purview Suite for Microsoft Business Premium License (Most of our Licenses are Business Premium or Business Standard) and its my assumption that I will need 2 licenses (1 for the investigator and 1 for the victim mailbox) can anyone verify this?”source ↗
“Unfortunately because licensing is device based we simply have too many devices to make it feasible to use.”source ↗
“PDQ connect is simply too expensive and is competing against an incumbent product that is effectively free for us.”source ↗
“Does each user require a data loss prevention license (or a license that includes it)?”source ↗
“I haven't found why one would choose Exchange Online Plan 2 over Business Basic(no teams) + DLP add-on. If anyone has input, please enlighten me.”source ↗
“I stand corrected - Even though I can add DLP add-on to Business Basic, it does not work....”source ↗
“We got a money with menaces email from them. I think it was three people had installed the Extras pack, which was licensable. Turns out it phones home.”source ↗
“They got us a few years later for the Java though.”source ↗
“I turned down a job purely because I'd need to support oracle e-business and I don't need that kind of drama in my life”source ↗
“We used to use it for local VMs for specific use cases. Stopped when Oracle started suing people for using their software.”source ↗
Where this came up
People with this problem also raised
- 4Vendor forced us from perpetual licenses to a subscription
- 26How to understand a confusing legacy software system you inherited
- 3How to market paid software without a free version
- 16Why can't I just see the price of software without a sales call?
- 6How to open old Microsoft Publisher .pub files
- 2Why can't I talk to a real person on enterprise software support?