Steps to reproduce:
In the admin's BO configuration, under "messaging", deselect Exchange Online and Exchange Server
Bug:
Unable to sax dynamic information from provider of id 'dynamic.info.mail' Caused by: java.lang.NullPointerException at org.ametys.plugins.exchange.ExchangeConnector#internalGetEmailsCount:264 at org.ametys.plugins.messagingconnector.AbstractMessagingConnector#lambda$getUnreadEmailCount$3:330 at org.ametys.plugins.core.impl.cache.GuavaCache$2#call:144 at org.ametys.plugins.core.impl.cache.GuavaCache$2#call:140 at com.google.common.cache.LocalCache$LocalManualCache$1#load:4868 at com.google.common.cache.LocalCache$LoadingValueReference#loadFuture:3533 at com.google.common.cache.LocalCache$Segment#loadSync:2282 at com.google.common.cache.LocalCache$Segment#lockedGetOrLoad:2159 at com.google.common.cache.LocalCache$Segment#get:2049 at com.google.common.cache.LocalCache#get:3966 at com.google.common.cache.LocalCache$LocalManualCache#get:4863 at org.ametys.plugins.core.impl.cache.GuavaCache#get:139