MOAC(Multi-Org Access Control)為多組織通路控制，是Oracle EBS R12的重要新功能，它可以實作在一個Responsibility下對多個Operation Unit(OU)進行操作。MOAC允許使用者在不切換responsibility的情況下，在一個responsibility下處理多個OU組織的事 務。
User --> Responsibilities --> Single Operation Unit Mode / Multiple Operation Unit Mode
一個應用場景:
某集團公司下邊主要分為三個區域（北美，歐洲，亞太），亞太區你是一采購部經理，負責所有七個Operation Unit。
這 種情況下，系統管理者可以建立一個security profile，這個security profile設定成可以通路這七個亞太組織，并把這個security profile賦予到你的responsibility下，這樣你就能在同一個職責下通路這七個OU了，就不用不停地切換職責來通路不同OU了。
另外如果你要經常進行中國OU下的事務，那麼你可以設定Profile:MO: Default Operating Unit到中國，那麼業務預設的OU就是中國了。
有三個主要的Profile
MO: Security Profile :provides access to multiple operating units from a single responsibility.If the MO: Security Profile is set, then the MO: Operating Unit profile will be ignored.
MO: Default Operating Unit :If you set the MO: Security Profile profile option, you can also set an operating unit as the default operating unit using the MO: Default Operating Unit profile option. This is useful when you transact in multiple operating unit but frequently transact in one operating unit.
MO: Operating Unit :MO: Operating Unit profile option only provides access to one operating unit.
1) If the profile option “MO: Security Profile” is not set, then “MO: Operating Unit” value is used as the default Operating Unit even if “MO: Default Operating Unit” profile is set to a different value.
2) If the profile option “MO: Security Profile” is set and gives access to only one Operating Unit, the default Operating Unit will return this value even if “MO: Default Operating Unit” is set to a different value.
3) If the profile option “MO: Security Profile” is set and gives access to multiple Operating Units :
- If the profile value “MO: Default Operating Unit” is set, it is validated against the list of Operating Units in “MO: Security Profile”.
+ If the Operating Unit is included in the security profile then it is returned as the default value.
+ Else there is no defaulted Operating Unit .
- If the Profile Option “MO: Default Operating Unit” is not set, then there is zero (no) default Operating Unit.
單組織即一個Responsibility隻通路一個OU，設定情況大體如下，對于職責：Manufacturing and Distribution Manager，
MO: Operating Unit=Vision Operations
MO: Security Profile=空
首 先定義一個Security Profile，路徑：HRMS Super User Responsibility > Security > Define Security Profile，Business Group:Vision Corporation,'Security Type'選擇'Secure organizations by organization hierarchy and/or organization list'，并且我們把在Organization Name清單中添加三個OU:Vision Operations，Vision Corporation ，Vision Services.
保 存定義的Security Profile,然後在HR職責下，運作“Security List Maintenance” program，“Generate lists for”= One Named Security Profile ，Security Profile是剛剛定義的'PTIAN_SECURITY_PROFILE'。
Security List Maintenance的作用是讓你定義的Security Profile生效，能夠設定到Profile "MO: Security Profile"（The Security List Maintenance concurrent program must be run each time you add or change Security Profiles.）