Exchange on-premises connection speed


There is a load of PST files on a separate disk on the on-prem Exchange server which need to be uploaded to Azure so I can import them in Exchange Online.

I am planning to install Azure AzCopy on the Exchange server to do this but I'm wondering if this PST upload will not have an impact on the performance of current client connections.

Does anyone have any tips around this? How do I go about this?

Jozef WooSystem EngineerAsked:
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Jose Gabriel Ortega CastroCEOCommented:
You can upload it directly to exchange online.
 o365.pngAnzures, upload it to azure or o365 will be the same exact thing, (it's better to skip the azure part). just go directly to the exchange online
Jozef WooSystem EngineerAuthor Commented:
HI Jose, thanks for the information. How do I prevent the PST upload to become a bottleneck on my connection? I want to prevent impact for users.
Vasil Michev (MVP)Commented:
Simply schedule the upload after working hours or over the weekend. Or if you prefer you can ship them to MS instead:
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Jozef WooSystem EngineerAuthor Commented:
Hi Vasil, thanks for that. I am planning to do it after working hours but it's a bit of a hassle because it's a lot of data and I'm sure it won't be finished after one night. That means I will have to divide the PST files in batches while estimating for each batch how long it will take and subsequently launching a new batch every evening. I found an article which could be helpful, using Policy-based QoS:

I will test it out. In the mean time if anyone has any experience with this or other tips are always welcome!
Jozef WooSystem EngineerAuthor Commented:
It seems the PST Upload doesn't go faster than around 20 Mbps while I have a connection of 100 Mbps. So no throttling is required in this case. Didn't even bother to try the Policy-based QoS. The link can be a reference in case anyone else needs it.

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Jose Gabriel Ortega CastroCEOCommented:
Yeah, you just need to do it something like today after working hours, so you will have the whole weekend the bandwidth.
Jozef WooSystem EngineerAuthor Commented:
It is the only real answer: I required throttling of the connection.
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