Capacity Model Constraints - Exchange
One of the following misconfiguration messages appear when an Exchange Server constraint occurs in the capacity model:
You have requested Standby Continuous Replication to <StandByDatacenters> standby datacenters, but only <MailboxSites> Mailbox Site(s) were marked as being standby datacenters.There must be at least one Client Access Server.At least one Client Access Server must be present in the same site as every Mailbox server.At least one Hub Transport Server must be present in the same site as every Edge Transport Server.The Inbox client type must always be present.All clients must be mapped to a Mailbox Server.Client <ClientName> in site <SiteName> must be mapped to <ServerName>Outlook Anywhere clients must have a Client Access Server in the same site as their Mailbox Server.Outlook Web Access clients must have a Client Access Server in the same site as their Mailbox Server.There cannot be more than 200,000 mailboxes.There must be at least one mailbox.There must be at least one Hub Transport Server.There must be at least one Mailbox Server.At least one Hub Transport Server must be present in the same site as every Mailbox server.The <RoleA> and <RoleB> roles cannot be installed on the same computer.Multiple Mailbox Server roles cannot be installed on the same computer.
Typically, one of these adjustment messages appears when you have modified a capacity model by removing or adding a software role that is required, or when a server role has been added to a server that conflicts with another server role. The table below describes server roles, and how they can and cannot be collocated with other components.
| Exchange Server Service Component | Constraint | Requires Supporting Component |
|---|---|---|
ActiveSync client |
Not required |
Client Access |
Client Access |
|
None |
Edge Transport |
|
There must be a Hub server in the same site. |
Hub Transport |
|
None |
Inbox |
Required |
Mailbox |
Mailbox, Simple (unclustered) |
|
|
Mailbox, CCR |
|
|
Mailbox, LCR |
|
|
Mailbox, SCC |
|
|
Mailbox, SCR |
|
|
Outlook Anywhere |
Not required |
Client Access |
Outlook (Cached) |
Not required |
Mailbox |
Outlook (online) |
Not required |
Mailbox |
Outlook Web Access |
Not required |
Client Access |
To make the required adjustments, use one of the following procedures:
- To edit a server role in the Model Editor procedure in the How to Edit a Server Hardware Configuration or a Server Role in the Model Editor topic to add a required role
- To edit a client profile in the Model Editor procedure in the How to Add, Edit, or Delete a Client Profile in the Model Editor topic to map clients to a mailbox server or to reduce the number of clients in the profile
- To move a software component between servers procedure in the How to Move A Server Role Between Servers topic to move a role from one server to another