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We were asked by one of our customers to help them merge three cloud sites together – data from two smaller cloud sites had to be merged into the big company site after the acquisition of two companies.
Usually we try to clean everything up before the migration, but our customer was in the time pressure. We’ve decided to do the cleanup after the merge, because the target instance also needed refactoring and complete revision. We only invested more time to the usage analysis of the applications, some of them were paid and this would mean billing increase in the future. Also cloud to cloud migration of the apps can be complicated. In the end we were able to get rid of almost all the applications.
In the beginning we wanted to use cloud to cloud migration native functionality, but it wasn’t possible. The main problem here was the users had old e-mail domains and these needed to be changed. Moreover some users were using two or even three accounts to access the same cloud site. So the goal here was to merge all the data together under one user account with the correct e-mail, so that the user will be able to see all the history and activity under the appropriate account. Because of this, we’ve divided the migration into the smaller migrations with the usage of DC instance.
First of all data from the first cloud site was imported into the clean DC instance, then user accounts were merged and then the data were migrated to the target cloud site using JCMA. After we tested everything, the second cloud site was processed in the same way.
After both migrations we had to perform minor manual fixes in the configuration in the target cloud site, but overall everything went well and users were able to start working immediately after the migration weekend.