This topic lists the limitations of RAM, such as the maximum number of users and the maximum number of user groups.

Item Limit
Maximum number of users 1,000
Maximum number of user groups 50
Maximum number of groups that a user can join 5
Maximum number of AccessKeys (AKs) that a user can create 2
Maximum number of MFA devices to which a user can attach 1
Maximum number of virtual MFA devices 1,000
Maximum number of custom policies 200
Maximum number of versions that a custom policy can have 5
Maximum number of custom policies that can be attached to a user 5
Maximum number of custom policies that can be attached to a user group 5
Maximum number of custom policies that can be attached to a role 5
Maximum number of system policies that can be attached to a user 20
Maximum number of system policies that can be attached to a user group 20
Maximum number of system policies that can be attached to a role 20
Maximum number of characters that a username can contain 64
Maximum number of characters that a user group name can contain 64
Maximum number of characters that a policy name can contain 128
Maximum number of characters that a role name can contain 64
Maximum number of roles 100
Number of characters that an alias can contain 3-64
Maximum number of characters that a custom policy name can contain 2,048
Maximum number of identity providers (IdPs) 100
Maximum number of IdP descriptors that an IdP metadata file can contain 1
Maximum number of certificates that an IdP descriptor in an IdP metadata file can contain 2