Migrate DLP from Exchange Online Admin Center to M365 Compliance Center

GoodResource 391

Hi,

As per M365 admin notification, it was informed that DLP is being retired from old Exchange Online Admin center. As per MS instructions, we migrated using the native way to compliance center and it was successful. We kept it as "test without notification" and didn't turn on as per the best practice. However it's been 2 days and we don't see any alerts or matching records being caught. No error is also showing on new DLP at M365 compliance center.

1 answer

Joy Zhang-MSFT 1,051 Reputation points

2022-04-04T03:03:55.84+00:00

Hi @GoodResource ,

Have you tried creating a DLP compliant test email and checking if this email is caught by DLP? Detailed steps for your reference: Test a DLP policy.
If mail is caught by DLP, it indicates that your DLP work well.

If the email cannot be caught by DLP, compare the migration steps in the official documentation to check if there are any missing steps.

If all of above don't work for you, you could try to recreate a DLP policy in M365 Compliance center to check if it works well.

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GoodResource 391 Reputation points

2022-04-06T14:40:18.677+00:00

I found the mail flow transport rules which were linked to old DLP policy got turned off once the migration took place. There were new rules got turned on in the new M365 compliance center but those are not traditional transport rules. They don't seem to be working. So what i did, i didn't turn on the old DLP policy but turned on the old transport rules which were linked to old DLP policy. I know it is not the new one which is working at this moment but manually some transport rules. Not sure if it is known issue at MS end.

Joy Zhang-MSFT 1,051 Reputation points

2022-04-08T07:13:52.4+00:00

Hi @GoodResource ,

For further troubleshooting, I want to confirm something with:

Do you turn on the old DLP rules in EAC and it works?

Make sure if your old rules are using unsupported conditions? If yes, you need to create a separate mail flow rule for conditions which are not supported in Unified DLP (Microsoft 365 DLP), remove the unsupported condition from the transport rule and perform the migration. Detailed information for your reference: What should I do if my rules are using unsupported conditions?

Could you try to create a new DLP rule in compliance center and check if it works well? This action can confirm whether the DLP function in your environment is intact.

In addition, If you only have a few DLP rules in your environment, the easiest and most efficient way is to recreate them in the compliance center

Joy Zhang-MSFT 1,051 Reputation points

2022-04-13T07:41:32.95+00:00

Hi @GoodResource ,
How is your issue going? If you have any questions or needed further help on this issue, please feel free to post back.
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Migrate DLP from Exchange Online Admin Center to M365 Compliance Center

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