Bitlocker Partition

Hi all,

I am struggiling with encrypron of Bitlocker.

We want to encrypt laptops via SCCM.

I have revieved manuals from MS and I noticed bitlocker require 2 partition:

BitLocker must use a system partition that is separate from the Windows partition. The system partition:

• Must be configured as the active partition.
• Must not be encrypted or used to store user files.
• Must have at least 250 MB of space.
• May be shared with a recovery partition.

Which partitions did microsoft mean (250 MB) ? EFI? Recovery partition?

I've noticed a lot of laptops have EFI about 100 MB.

Is it a problem for BItlocker ?

Thank you,