Manually Optimizing the schema (4251352)

How to manually optimize the Active Directory schema

On the AD Schema master
At a command prompt, type:
regsvr32 schmmgmt.dll

NOTE: RegSvr32 has been successfully registered when a DllRegisterServer in schmmgmt.dll succeeded dialog box is displayed.
Open a new management console by clicking Start, click Run, and then type:

MMC

On the Console menu, click Add/Remove Snap-in.
Click Add to open the Add Standalone Snap-in dialog box.
Click Active Directory Schema, and then click Add.
Click on Attributes on Left pane

From the list

Find uidNumber -> Right click properties
Tick "Replicate this attribute to the Global Catalog"
Tick "Index this attribute in the Active Directory"
Click OK

Find gidNumber-> Right click properties
Tick "Replicate this attribute to the Global Catalog"
Tick "Index this attribute in the Active Directory"
Click OK

Find gecos
Tick "Replicate this attribute to the Global Catalog"
(No requirement for this or the following attributes to be indexed)
Click OK

Repeat for the attributes
unixHomeDirectory
loginShell
gidNumber

Optionally, you can also Replicate the following attributes to the Global Catalog
logonHours
accountExpires
pwdLastSet
lockOutTime