Applies to: User Mailbox, and Journal Mailbox
The access node is the server that runs archiving and cleanup jobs for the User Mailbox and the Journal Mailbox.
Important
-
For high-availability, configure at least two access nodes.
-
Use an access node for every 10,000 mailboxes in your environment.
-
We recommend that you use extra access nodes and service accounts for the first full job.
Access Node Size Without Content Indexing
If you do not use content indexing, base the size of your access nodes on these guidelines.
|
Number of mailboxes* |
5000 |
10,000 |
|---|---|---|
|
Number of messages per day** |
500,000 |
1 million |
|
Online Service account or Azure Apps (Modern Authentication) |
5 |
10 |
|
On-Premises Service Account |
2 (1 per Exchange Server) |
4(1 per Exchange Server) |
|
CPU or vCPU, and RAM |
CPU or vCPU: 4 cores RAM: 8 GB |
CPU or vCPU: 8 cores RAM: 16 GB |
|
Streams per access node |
10 |
20 |
* Based on an average mailbox size of 5 GB, and an average of 50,000 messages per mailbox.
** Based on an average message size of 100 KB.
Access Node Size with Content Indexing
If you use content indexing, base the size of your access nodes on these guidelines.
|
Number of mailboxes* |
5000 |
10,000 |
|---|---|---|
|
Number of messages per day** |
500,000 |
1 million |
|
Online Service account or Azure Apps (Modern Authentication) |
5 |
10 |
|
On-Premises Service Account |
2 (1 per Exchange Server) |
4(1 per Exchange Server) |
|
CPU or vCPU, and RAM |
CPU or vCPU: 8 cores RAM: 16 GB |
CPU or vCPU: 16 cores RAM: 32 GB |
|
Streams per access node |
10 |
20 |
* Based on an average mailbox size of 5 GB, and an average of 50,000 messages per mailbox.
** Based on an average message size of 100 KB.