What is the best way to migrate Azure VMs from one storage account to another

I need to migrate several Azure VMs from one storage account to the other, while preserving drive mappings.
The storage account is not premium. The team has spent a lot of time, even working with Azure storage support but not much of a progress.
The key challenge is "while preserving drive mappings" as some of the servers have lots of drives.

https://azure.microsoft.com/en-us/blog/migrate-azure-virtual-machines-between-storage-accounts/ and other sources show a single drive which is far away from real life.

Thanks in advance.
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
Preserving drive mappings meaning keeping the partition's drive letter within the VM?

Last time I checked, Azure does not give console access to the VM that would allow Safe Mode or boot to CMD to use DiskPart to assign the correct letters. Some Windows Azure Pack implementations have been set up to allow that. Microsoft has decided not to.

May I ask, why so many drives hooked into one VM? The answer may help in the formulation of a direct to take.

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IT-NYCAuthor Commented:
Yes, the choice of words was not the best with 'mapping'. Those are VHDs, mounted as drives. Each of  them has a separate function (data, logs, backups, etc.)
In a solution, I am looking to eliminate a guesswork of matching original drives to the destination.
Philip ElderTechnical Architect - HA/Compute/StorageCommented:
There is no magic way that I know of. We boot to OS ISO, use DiskPart to reset the letters, then boot the VM.

I'd be more than happy to change our methodology of someone comes along with a better process.
IT-NYCAuthor Commented:
Let's wait a few days.
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