Today I received the information from HCL Support that the current version of the Room and Resource calendar does not have the feature to span meetings with 24+ hours.

There´s a request for this option in the Domino Ideas Portal ( please vote !! )

https://domino-ideas.hcltechsw.com/ideas/DOMINO-I-1246

There´s also a SPR # ASAEBQELLY created for this issue. So if you want this issue solved quick, open a case and reference to the case number CS0125933 and SPR # ASAEBQELLY.