Verify that the access nodes for Exchange Online meet the guidelines. Access nodes run backups and other operations.
For high availability (which is recommended for the first full backup), use 2 or more access nodes.
With Content Indexing
If you use content indexing, use the following guidelines.
|
Environment |
Medium |
Large |
|---|---|---|
|
Mailboxes |
5,000 |
10,000 |
|
Messages per day |
500,000 |
1 million |
|
Guidelines |
||
|
Access nodes |
|
|
|
CPU or vCPU for the access nodes |
8 cores |
16 cores |
|
RAM for the access nodes |
16 GB |
32 GB |
|
Streams per access node |
10 |
20 |
Without Content Indexing
If you do not use content indexing, use the following guidelines.
|
Environment |
Medium |
Large |
|---|---|---|
|
Mailboxes |
5,000 |
10,000 |
|
Messages per day |
500,000 |
1 million |
|
Guidelines |
||
|
Access nodes |
|
|
|
CPU or vCPU for the access nodes |
4 cores |
8 cores |
|
RAM for the access nodes |
8 GB |
16 GB |
|
Streams per access node |
10 |
20 |
Assumptions
The guidelines are based on the following assumptions:
-
The average mailbox size is 5 GB.
-
The average number of messages in each mailbox is 50,000.
-
The average message size is 100 KB.