The following components are required for the proper functioning of the Messaging system on your IT infrastructure:
Network
Exchange server (optional)
Telephony server
Messaging storage role
Messaging application role
Messaging sites and topology
The following table describes the initial administration tasks, the administrator who performs these tasks, and the component required by the administrator to perform and complete the tasks.
Since, IT responsibilities in large organizations are divided among different individuals, each chapter in the table contains the necessary information required by a specific administrator.
You must complete the chapters in the following sequence:
| Location | ||||||
|---|---|---|---|---|---|---|
| No. | Task | Chapter number | Administrator type | Single-server systems | Front-end / Back-end systems | 
|
| 1 | Prepare the network | Chapter 1 | Network administrator | — | — | |
| 2 | Load the Avaya voice messaging forms onto the Exchange server | Chapter 1 | Exchange administrator | Exchange server | Exchange server | |
| 3 | Prepare the telephony server | Supported and Unsupported Avaya Aura Messaging Integrations on http://support.avaya.com/ | Switch administrator | Telephony server | Single site: Telephony server
Multisite: Each telephony server |
|
| 4 | Set up the storage role | Chapter 3 | Messaging administrator | Single server | Storage server | |
| 5 | Set up the application role | Chapter 4 | Messaging administrator | Single server | Each application server | |
| 6 | Set up sites and topology | Chapter 5 | Messaging administrator | Single server | Storage server | |