msExchRecipientTypeDetails

Object Type	RecipientTypeDetails (Decimal Value)
User Mailbox	1
Linked Mailbox	2
Shared Mailbox	4
Legacy Mailbox	8
Room Mailbox	16
Equipment Mailbox	32
Mail Contact	64
Mail-enabled User	128
Mail-enabled Universal Distribution Group	256
Mail-enabled non-Universal Distribution Group	512
Mail-enabled Universal Security Group	1024
Dynamic Distribution Group	2048
Mail-enabled Public Folder	4096
System Attendant Mailbox	8192
Mailbox Database Mailbox	16384
Across-Forest Mail Contact	32768
User	65536
Contact	131072
Universal Distribution Group	262144
Universal Security Group	524288
Non-Universal Group	1048576
Disabled User	2097152
Microsoft Exchange	4194304
Remote User Mailbox	2147483648
Remote Room Mailbox	8589934592
Remote Equipment Mailbox	17173869184
Remote Shared Mailbox	34359738368

                

 Orignal Post:https://blogs.technet.microsoft.com/dkegg/2014/05/09/msexchrecipienttypedetails/