Cisco DMP-4400G-K9 Quick Start Manual page 28

Ch
— you must then return to this Server Settings
page and update the values so that they are identical to the
new credentials for your DMPs. Otherwise, if you do not
update this information, DMM-DSM will use obsolete
credentials when it tries to communicate with your DMPs
and, when communication fails, will consider your DMPs
to be unreachable and unmanageable.
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