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Archive mailbox causes Backup health to drop?

  • 26 June 2023
  • 6 replies
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Hi all,

Hoping someone can help me out - I recently enabled archive mailbox on my Exchange Online backups and I’m seeing that my backup health has dropped and some jobs are committing.

Is this normal, if not - how can I fix it?

Thanks

 

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Best answer by Michael Mancino 26 June 2023, 21:12

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Hi @EBL Admin,

Thanks for reaching out on the Metallic community. 

In some scenarios, when archive mailbox is enabled, you will see jobs start to commit, and backup health drop a bit. This could be due to a large archive mailbox which we are actively processing. 

Take a look at this Knowledge Base article which can explain further: Mailbox backups for a user or for multiple users never complete, due to a large archive mailbox

Thanks,

Mike

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There isn’t much archive data present so assuming once this is done backing up, it will catch up on it’s own again?

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In general exchange backups aren’t as efficient as e.g. on-prem ones. There’s a full backup triggered first time, it’s usually long lasting. Then incremental backups are triggered e.g. each day, which are usually short ones. 

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Hi EBL Admin 

Microsoft does to some throttling in the background with Archive data so it can seem slower than the Primary Exchange data. 

Once Metallic has read the new unique data you should see jobs return to normal as the incremental jobs will be backing up small change rates in data. 

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Thanks @Ryan Carr and @Lukas3D.

@EBL Admin  - Correct, as mentioned - archive data can seem slower but yes, once processed it will catch up on it’s own.

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Thank you all for the responses and the help @Lukas3D  @Ryan Carr  and @Michael Mancino!

I’ll keep an eye out as this progresses and come back if there are any further questions.

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