You can configure static catalog access instead of creating catalogs dynamically.

ID: InstanceStaticLoginsType

Static mode

Determines whether the statically configured mailboxes should be processed with impersonation or separately or whether they should be used as forwarded journal recipients.

ID: InstanceStaticLoginsType.StaticMode (references: StaticCatalogType)

IMAP server

Contains the address of the IMAP server

ID: InstanceStaticLoginsType.Server

IMAP port

Contains the IMAP port used for connecting to the IMAP server. The value usually depends on the IMAP security setting.

ID: InstanceStaticLoginsType.Port

IMAP security

Sets the security mechanism for the IMAP connection. You need to select the right port.

ID: InstanceStaticLoginsType.SecOpt (references: ImapSecureOptionsType)

Static authentication

Specifies that authentication is statically configured

ID: InstanceStaticLoginsType.Auth (references: LoginType)