BO4 - Which servers use/need 32-bit drivers

Hi,

Looking at admin manual mentions some serves use 32 bit rather than 64-bit servers.

Can't find mention of exact ones e.g if only Crytsal ones then is it worh installing the 32-bit middleware e.g oracle client.?

Using BO4 SP5 on Winodws 2008 R2 servers (primarily WEBI, some dahsboards - no Crytsal currently used)

Anyone know eaxctly which services use 32-bit as oppose to 64-bit drivers.

If so assume fine just to isnatll under same user account on windows server as the account used to install the 64-bit cleint.

Thanks