<div>Hi, </div>
<div><br>We are planning to upgrade a customer to CUCM 8.6 on UCS from 6.1(3) on MCS. </div>
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<div>I understand the upgrade process but the customer has thrown us a curve ball by asking that in order to mitigate downtime on their solution we use a spare MCS server and rebuild it as a Publisher before upgrading to 6.1(4) then 8.6 ready for the DRS backup and restore onto UCS. </div>
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<div>They have around 50 x license files which have been added incrementally over the last few years. </div>
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<div>My question is whether I'll need to get each license file rehosted to the spare MCS server's MAC or whether I can simply apply for a rollup license from TAC when it's eventually restored on the UCS?</div>
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<div>Has anybody been through a similar upgrade experience?</div>
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<div>Thanks in advance</div>