Now... sure, the Trump tower probably has a server. They run a business. They have tenants of the building, they have rich foreigners. They might just handle accounting related to the business... people pay rents/HOA fees/etc. via bill pay, direct debit, credit cards... if any Russians own property in the tower, then by definition the tower's computer has "connections" with the tenants/owners' banks... possibly Russian (Chinese, etc.) banks.
Fake news may be a gross understatement of the facts.