Abstract: Systems and methods ensure that datagrams retain integrity in light of the problems associated with the internetworking protocol's use of datagram identifiers drawn from a first pool of datagram identifiers. The methods involve controlling the use of datagram identifiers to ensure that only certain identifiers are allowable. A second pool of datagram identifiers is created that is different from the first pool. A datagram identifier is drawn from the second pool and assigned to a datagram in a manner that the datagram identifier is controlled from being reused during the lifetime of the datagram. In alternative embodiments the number of available datagram identifiers is either increased through optional header fields, or reduced through tracking allowed datagram identifiers. A first host notifies a second host of an allowed identifier. The second host uses the allowed identifier as a datagram identifier.

Abstract: This invention provides the capability to plan, monitor and control post-failure switching of user mail access hosted on Microsoft Exchange servers at the granularity of individual user mailboxes. It offers a convenient point-and-click mechanism for achieving a very complex task, and allows replication of e-mail data from a Primary Exchange Server to a Standby Exchange Server at a level of data granularity and flexibility not previously available. No limitations are placed on which Exchange servers belonging to the user of this solution are to be in a primary or standby role, and it is possible to have two Exchange servers, each acting as an active primary for mailboxes which it is hosting AND acting as a standby for mailboxes hosted on the other server. In addition, it also provides a uniquely powerful capability for migration of mailboxes between Exchange servers.

Abstract: This invention provides the capability to plan, monitor and control post-failure switching of user mail access hosted on Microsoft Exchange servers at the granularity of individual user mailboxes. It offers a convenient point-and-click mechanism for achieving a very complex task, and allows replication of e-mail data from a Primary Exchange Server to a Standby Exchange Server at a level of data granularity and flexibility not previously available. No limitations are placed on which Exchange servers belonging to the user of this solution are to be in a primary or standby role, and it is possible to have two Exchange servers, each acting as an active primary for mailboxes which it is hosting AND acting as a standby for mailboxes hosted on the other server. In addition, it also provides a uniquely powerful capability for migration of mailboxes between Exchange servers.

Abstract: Systems and methods ensure that datagrams retain integrity in light of the problems associated with the internetworking protocol's use of datagram identifiers drawn from a first pool of datagram identifiers. The methods involve controlling the use of datagram identifiers to ensure that only certain identifiers are allowable. A second pool of datagram identifiers is created that is different from the first pool. A datagram identifier is drawn from the second pool and assigned to a datagram in a manner that the datagram identifier is controlled from being reused during the lifetime of the datagram. In alternative embodiments the number of available datagram identifiers is either increased through optional header fields, or reduced through tracking allowed datagram identifiers. A first host notifies a second host of an allowed identifier. The second host uses the allowed identifier as a datagram identifier.